#include<stdio.h>#include<stdlib.h>int main(){int a,t,i=0;printf("请输入一个不多于五位的正整数:");scanf("%d",&a);int b[5];int count=0;while(a){t=a%10;b[i++]=t;a/=10;}printf("是%d位数\n",i--);printf("顺序：");count =i;while(i>=0){printf("%d",b[i--]);}printf("\n逆序:");for(int k=0;k<=count;k++){printf("%d",b[k]);} return 0;}
#include<stdio.h>#include<stdlib.h>#include<string.h>int main(){char a[5]={'g','e','y','f','p'};//5个字符int i,j,k;char ch; for(i=0;i<4;i++){k=i;for(j=i+1;j<5;j++){if(((a[k]-a[j]))>0)k=j;}if(k!=i){ch=a[i];a[i]=a[k];a[k]=ch;}} for(i=0;i<5;i++){printf("%c",a[i]);}return 0;}
#include<stdio.h>#include<stdlib.h>#include<string.h>#include<time.h> #include<math.h> struct student{int num;float score[6];}stu[10],*p;int main(){srand((unsigned int)time(NULL));int i;int j;for(i=0;i<10;i++){p=&stu[i];p->num=i+1;for(j=0;j<5;j++){p->score[j]=rand()%50+50;}p->score[5]=(p->score[0]+p->score[1]+p->score[2]+p->score[3]+p->score[4])/5;}p=&stu[0];printf("学号 成绩1 成绩2 成绩3 成绩4 成绩5 平均成绩\n");for(i=0;i<10;i++){p=&stu[i];printf("%2d%8.1f%8.1f%8.1f%8.1f%6.1f%6.1f\n",p->num,p->score[0],p->score[1],p->score[2],p->score[3],p->score[4],p->score[5]);}//打印成绩void func1();func1();void func2();func2();void func3();func3();return 0;}void func1(){int i,j;float averge=0,sum=0;for(j=0;j<5;j++){sum=0,averge=0;for(i=0;i<10;i++){p=&stu[i];sum+=p->score[j];}averge=sum/10;printf("第%d门课平均分是:%8.2f\n",j+1,averge);}}void func2(){int i,j,t=0,m,n;for(i=0;i<10;i++){p=&stu[i];for(j=0;j<5;j++){if(p->score[j]>t){t=p->score[j];m=i;n=j;}}}printf("最高分数是%d位学生%d门课%d分\n",m+1,n+1,t);} void func3(){int i,j;float s,s1=0,s2=0,averge=0;for(i=0;i<10;i++){p=&stu[i];s1+=p->score[5]*p->score[5];s2+=p->score[5];}s1=s1/10;s2=pow((s2/10),2);s=s1+s2;printf("方差是:%f\n",s);}
#include<stdio.h>#include<math.h>#include<stdlib.h>int main(){FILE *fp;if((fp=fopen("result.dat","w"))==NULL){printf("error!");exit(0);}printf("请输入一个数：");int n;scanf("%d",&n);int prism(int n);if(prism(n)){printf("%d是素数\n",n);}else{printf("%d不是素数\n",n);}int i;if(n%2==0){for(i=1;i<=n/2;i++){if(prism(i)&&prism(n-i)){printf("%d+%d=%d\n",i,n-i,n);fprintf(fp,"%d+%d=%d\n",i,n-i,n);}}}fclose(fp);return 0;}int prism(int n){int i,flag=1;for(i=2;i<n;i++){if(n%i==0)return flag=0;}return flag;}
#include<stdio.h>#include<math.h> #include<string.h> int main(){int a,b,c;float x1,x2,t;printf("请输入a,b,c:");scanf("%d,%d,%d",&a,&b,&c);if(a==0){if(b==0){if(c==0){printf("no answer!");}else{printf("no answer!");}}else if(c==0){x1=0;x2=-c/a;printf("x1=%f,%2=%f\n",x1,x2);}else{printf("no answer!");} }else if(b==0){if(c=0){x1=x2=0;printf("x1=%f,%2=%f\n",x1,x2);}else if(c<0){printf("no answer!");}else if(c>=0){x1=sqrt(-c/a);x2=sqrt(c/a);printf("x1=%f,%2=%f\n",x1,x2);} }else if(c==0){x1=0;x2=-b/a;printf("x1=%f,%2=%f\n",x1,x2);}else{t=(b*b-4*a*c);if(t<0){printf("no answer!");}else{x1=((-b-sqrt(b*b-4*a*c))/2*a);x2=((-b+sqrt(b*b-4*a*c))/2*a);printf("x1=%f,%2=%f\n",x1,x2);}}return 0;}
#include "stdio.h"#include "stdlib.h"#include<string.h>#include<math.h> int main(){int a[3][3]={2,6,4,6,0,8,4,3,9};int i,j,k,m,flag,h,l;;for(i=0;i<3;i++){k=a[i][0];flag=1;for(j=0;j<3;j++){if(a[i][j]>k){k=a[i][j];//找出第i行的行最大 h=i;l=j;}}for(m=0;m<3;m++){if(a[m][l]>k)flag=0;}if(flag){printf("第%d行%d列%d是鞍点\n",h+1,l+1,k);}}return 0; }
#include "stdio.h"#include "stdlib.h"#include<string.h>#include<math.h> int main(){float a[21], b[20];a[0]=1;a[1]=2;float s=0;int i;for(i=2;i<=20;i++){a[i]=a[i-1]+a[i-2];}for(i=0;i<20;i++){b[i]=a[i+1];}for(i=0;i<20;i++){s+=b[i]/a[i];}printf("s=%.2f\n",s);return 0; }
#include<stdio.h>#include<time.h>#include<stdlib.h> struct student{int num;float score[6];}stu[30],*p;//30个学生5门课 int main(){srand((unsigned int)time(NULL));//利用系统时间产生随机数 每次运行时间不同产生的随机数序列 int i;int j;for(i=0;i<30;i++){p=&stu[i];p->num=i+1;for(j=0;j<5;j++){p->score[j]=rand()%50+50;}p->score[5]=(p->score[0]+p->score[1]+p->score[2]+p->score[3]+p->score[4])/5;}p=&stu[0];printf("学号 成绩1 成绩2 成绩3 成绩4 成绩5 平均成绩\n");for(i=0;i<30;i++){p=&stu[i];printf("%2d%6.1f%6.1f%6.1f%6.1f%6.1f%6.1f\n",p->num,p->score[0],p->score[1],p->score[2],p->score[3],p->score[4],p->score[5]);}//打印成绩void func1();func1();void func3();func3();void fun2();fun2();return 0; }void func1(){int i,j;float averge=0,sum=0;for(i=1;i<30;i++){p=&stu[i];sum+=p->score[0];}averge=sum/30;printf("第一门课平均分是:%8.2f\n",averge);}void func3(){printf("2门及以上不及格的学生：\n");int i,j,t;for(i=0;i<30;i++){t=0;p=&stu[i];for(j=0;j<5;j++){if(p->score[j]<60)t++;}if(t>=2)printf("%2d%6.1f%6.1f%6.1f%6.1f%6.1f%6.1f\n",p->num,p->score[0],p->score[1],p->score[2],p->score[3],p->score[4],p->score[5]);}}void fun2(){printf("平均成绩90以上或者全部成绩85以上学生：\n");int i,j,t;float s,ave;for(i=0;i<30;i++){s=0;ave=0;t=0;p=&stu[i];for(j=0;j<5;j++){s+=p->score[j];if((p->score[j])>85)t++;}ave=s/5;if(t==5||ave>90)printf("%2d%6.1f%6.1f%6.1f%6.1f%6.1f%6.1f\n",p->num,p->score[0],p->score[1],p->score[2],p->score[3],p->score[4],p->score[5]);}}
#include<stdio.h>int main(){float jia(float x,float y);float pf(float x,float y);float chu(float x,float y);float x=1,y=100;float s;s=jia(x,100)+pf(1,100)+chu(1,100);printf("%.2f",s);return 0;}float jia(float x,float y) {float s=0;int i;for(i=x;i<=y;i++){s+=i;}return s;}float pf(float x,float y){float s=0;int i;for(i=x;i<=y;i++){s+=i*i;}return s;}float chu(float x,float y){float s=0;int i;for(i=x;i<=y;i++){s+=1/i;}return s;}
2
#include<stdio.h>int main(){int i;int g,s,b;for(i=100;i<1000;i++){g=i%10;s=i/10%10;b=i/100;if((g*g*g+s*s*s+b*b*b)==i){printf("%d是水仙花数\n");}} return 0;}
3
#include<stdio.h> int main(){int a[4]={0};int i,count=0;scanf("%d",&i);while(i!=-1){if(i==1){a[0]++;count++;}else if(i==2){a[1]++;count++;}else if(i==3){a[2]++;count++;} else if(i==4){a[3]++;count++;}scanf("%d",&i);} for(i=0;i<4;i++){printf("%d:%d\n",i+1,a[i]);if(a[i]>count/2){printf("%d当选\n",i+1);}}return 0;}
4
#include<stdio.h>#include<string.h> int main(){int i,j,k;char ch;printf("请输入一个大写字母：");ch=getchar();k=ch-64;//上三角的行数 for(i=1;i<=k;i++){for(j=k-i;j>0;j--){printf(" "); }for(j=1;j<=2*i-1;j++){printf("%c",64+i);}printf("\n");}for(i=1;i<k;i++)//{for(j=1;j<=i;j++){printf(" ");}for(j=1;j<2*(k-i);j++){printf("%c",ch-i);}printf("\n");}return 0;}
#include "stdio.h"#include "stdlib.h"int main(){char ch;printf("请输入一个小写字母：");scanf("%c",&ch);ch=ch-32;printf("相应的大写字母是:%c\n",ch);return 0;}
2
#include "stdio.h"#include "stdlib.h"int main(){int n;float x,s;scanf("%d,%f",&n,&x);float pnx(int n,float x);printf("%f\n",pnx(n,x));return 0;}float pnx(int n,float x){float s;if(n==0)s=1;else if(n==1)s=x;else s=((2*n-1)*x*pnx(n-1,x)-(n-1)*pnx(n-2,x))/n;return s; }
3
#include "stdio.h"#include "stdlib.h"int main(){int i,j,k;for(i=1;i<=1000;i++){k=0;for(j=1;j<i;j++){if((i%j)==0){k+=j;}}if(i==k){printf("%d是完数\n",i);}}return 0;}
4
#include<math.h>#include<stdio.h> int main() /*我写的 {float h=100,s=100,m;int i;m=h/pow(2,9);for(i=1;i<=9;i++){s+=2*(h/pow(2,i));} printf("yigong:%f\ndi10ci fantan:%f\n",s,m);return 0;}*///答案上的 {float h=100,s=100;for(int i=1;i<10;i++){h=h/2;s+=h*2;}printf("%f %f",s,h);return 0;}
5
#include "stdio.h"#include "stdlib.h"#include<string.h> int main(){char s[50]={"A123x456$%/1789>3560tab587"},*p=s;printf("statistic:");void statistic(char *p);statistic(p);return 0;}void statistic(char *p){int a[10];int i=0,j=0,b=0;for(i=0;*(p+i)!='\0';i++){if(*(p+i)>='0'&&*(p+i)<='9'){b=*(p+i)-'0'+b*10;if(*(p+i+1)>'9'||*(p+i+1)<'0'){a[j]=b;j++;b=0;}}}printf("The sum is:");for(int k=0;k<j;k++){printf("%-6d",a[k]);}}
#include "stdio.h"#include "stdlib.h"int main(){int num,k=0,a[5];do{printf("the original num is:");scanf("%d",&num);}while(num<0||num>99999);printf("逆序：");while(num){a[k++]=num%10;printf("%-2d",num%10);num/=10;}printf("正序：");k--;while(k>=0){printf("%-2d",a[k--]);}return 0;}
2
#include "stdio.h"#include "stdlib.h"int main(){int i;int g, s, b;for(i=100;i<1000;i++) {g = i%10;s = i/10%10;b = i/100;if(i==(g*g*g+s*s*s+b*b*b)) {printf("%d is 水仙花数\n",i);}} return 0;}
省事儿就写了两个学生三门课程
#include "stdio.h"#include "stdlib.h"int main(){void pjf(float a[2][3]);void kepjf(float a[2][3]);void zgfs(float a[2][3]);void pjfc(float a[2][3]);float a[2][3] = {90.6, 70, 80, 60.4, 99, 98};pjf(a);kepjf(a);zgfs(a);pjfc(a);return 0;}void pjf(float a[2][3]){int i, j;float s = 0;for(i = 0; i < 2; i++) {s = 0;for(j = 0; j < 3; j++) {s += a[i][j];} printf("第%d平均分是:%f\n", i + 1, s/3);}}void kepjf(float a[2][3]){int i, j;float s = 0;for(i = 0; i < 3; i++) {s = 0;for(j = 0; j < 2; j++) {s = s + a[j][i];} printf("第%d每门课的平均分是:%f\n", i + 1, s/2);} }void zgfs(float a[2][3]){int i, j, m, n;float s = 0;for(i = 0; i < 3; i++) {for(j = 0; j < 2; j++) {if(a[i][j] > s) {s = a[i][j];m = i + 1;n = j + 1;}} } printf("第%d个课最高分是第%d个学生%.2f分\n", m, n, s);}void pjfc(float a[2][3]){float p = 0;int i, j;for(i = 0; i < 3; i++) {for(j = 0; j < 2; j++) {p += a[i][j];} } p/= 3;float s = 0;for(i = 0; i < 3; i++) {for(j = 0; j < 2; j++) {s += (a[i][j] - p) *(a[i][j] - p);} } s = s/(i*j);printf("方差是%f\n", s);}
4
#include "stdio.h"#include "stdlib.h"int main(){int a[3][3] = {1, 12, 3, 4, 5, 2, 7, 18, 6 };int flag = 1;int i, j, d[3] = {0}, m[3] = {0}, n[3] = {0};for(i=0;i<3;i++){for(j=0;j<3;j++){printf("%3d",a[i][j]);}printf("\n");} printf("*************************************\n");for(i = 0; i < 3; i++) {for(j = 0; j < 3; j++) {if(a[i][j] > d[i]) {d[i] = a[i][j]; m[i] = i;n[i] = i;} }} for(i = 0; i < 3; i++) {flag = 1;for(j = 0; j < 3; j++) {if(a[j][i] > d[i]) flag = 1;else flag = 0;} if(flag) {printf("第 %d 行 %d 列 数字 %d 是鞍点\n", m[i]+1,n[i]+1,d[i]); }} return 0;}
#include<stdio.h>#include<math.h>int main(){float p;float pn(int n,float x);printf("%.2f\n",pn(5,2.4));return 0;}float pn(int n,float x){float s;if(n==0)s=1;else if(n==1)s=x;else s=((2*n-1)*x*pn(n-1,x)-(n-1)*pn(n-2,x))/n;return s;}
2
#include<math.h>#include<stdio.h> int main() {float i=1;float k=-1;float s=1;float m=1;while(fabs(m)>1e-6){i=i + 2;m=1/i;s=s+(k*m);k=-k;}printf("派的值为:%f\n",4*s);return 0;}
3
#include<math.h>#include<stdio.h> int main() /*我写的 {float h=100,s=100,m;int i;m=h/pow(2,9);for(i=1;i<=9;i++){s+=2*(h/pow(2,i));} printf("yigong:%f\ndi10ci fantan:%f\n",s,m);return 0;}*///答案上的 {float h=100,s=100;for(int i=1;i<10;i++){h=h/2;s+=h*2;}printf("%f %f",s,h);return 0;}
4
#include<math.h>#include<stdio.h> #define N 20int main() {int i=N-1,j=0,k=1;int a[N][N];a[N-1][0]=k++;while(k<=N*N){if(i==0)j++;//向上拐else i--;//向上拐for(;i<N&&j<N;i++,j++)//右下到底{a[i][j]=k++;}i--;j--;//复原数据 if(j==N-1)i--;//向上拐else j++;//右 for(;i>=0&&j>=0;i--,j--)//左上 {a[i][j]=k++;}i++;j++;}for(i=0;i<=N-1;i++){for(j=0;j<N;j++){printf("%5d",a[i][j]);}printf("\n");}return 0;}
#include "stdio.h"#include "stdlib.h"int main(){float hermite(int n,float x); int n; float x;scanf("%d,%f", &n, &x);printf("%.2f\n", hermite(n, x));return 0;}float hermite(int n,float x){float h;if(n==0) h=1;else if(n==1) h=2*x;else if(n>1) h= 2*x*hermite(n-1,x)-2*(n-1)*hermite(n-2,x);return h;}
2
#include "stdio.h"#include "stdlib.h"#include<math.h> int main(){float n=1;float x=0, y=1;while(fabs(y-x)>=1e-6) {x = y;y = pow((1+1/n),n);n += 1;}printf("e:%.6fn:%.1f\n",y,n);return 0;}
3
#include "stdio.h"#include "stdlib.h"#include<math.h> #define N 3struct student{int id;char name[10];float grade[4];}stu[N],*p,temp;int main(){int i=0;FILE *fp;if((fp=fopen("student.dat","w"))==NULL){printf("error");exit(0);} //打开文件 do{p=&stu[i];p->id=i+1;printf("输入第%d个学生的姓名：",i+1);scanf("%s",&p->name);printf("输入第%d个学生的语数英成绩:",i+1);scanf("%f,%f,%f",&p->grade[0],&p->grade[1],&p->grade[2]);p->grade[3]=p->grade[0]+p->grade[1]+p->grade[2];i++;printf("*********************************\n");}while(i<N);//输入成绩for(int i=0;i<N-1;i++){int k=i;for(int j=i+1;j<N;j++){if(stu[j].grade[3]>stu[k].grade[3]){k=j;}if(i!=k){temp=stu[k];stu[k]=stu[i];stu[i]=temp;}}} //由总分由大到小排序i=0;do{p=&stu[i];fwrite(p,sizeof(struct student),1,fp);printf("%-6d%-15s%-6.1f%-6.1f%-6.1f%-6.1f",p->id,p->name,p->grade[0],p->grade[1],p->grade[2],p->grade[3]);//写入结构体for(int j=0;j<=i;j++){if(stu[j].grade[3]==stu[i].grade[3]){fprintf(fp,"%6d\n",j+1);printf("%6d\n",j+1);break;}//总分相同时写入的名次 else{fprintf(fp,"%6d\n",i+1);printf("%6d\n",i+1);break;}} i++; } while(i<N);fclose(fp);return 0;}
#include "stdio.h"#include "stdlib.h"int main(){int n;int fbqn(int n);int i, j, sum = 0,s=0;FILE *fp;if((fp=fopen("fab.txt", "w")) == NULL) {printf("file open error!\n");exit(0);}for(i = 1; i <= 20; i++) {sum = fbqn(i);printf("f(%d)=%d\n",i,sum);fprintf(fp,"%d\n",sum);s+=sum;} printf("f(%d)=%d\n",i,s);fclose(fp);return 0;}int fbqn(int n){int f=0;if(n==1||n==2) f=1;else if(n>2) f=fbqn(n-1)+fbqn(n-2);return f;}
2
#include "stdio.h"#include "stdlib.h"int main(){int i;int g, s, b, w,q, n;for(i = 30; ; i++) {n = i*i;if(n >= 1000&&n < 10000) {g = n % 10;q = n/1000;b = n/100 % 10;s = n % 100/10;if((b ==q) &&(s ==g)) {printf("车牌号是：%d\n", n);}}} return 0;}
3.不会了
书上有
1.感觉有点啰嗦但是很完整滴
#include "stdio.h"#include "stdlib.h"#include<string.h>#include<math.h> int main(){FILE *fp;if((fp=fopen("Coefficient.txt","r"))==NULL){printf("error");exit(0);} int arr[10][3];static int i=0;char ch=fgetc(fp);//从文件读数据 while(!feof(fp))//不是文件尾 {static int j=0;if(ch>='0'&&ch<='9'){arr[i][j]=ch-'0';//字符变成数字 j++;}if(ch=='\r'||ch=='\n'){i++;j++;//换行 }ch=fgetc(fp);}printf("系数矩阵是：");putchar(10);//换行for(int i1=0;i1<=i;i1++){for(int j=0;j<3;j++)//上面的j是for循环里面的局部变量{printf("%-3d",arr[i][j]);} putchar(10);} //int a,b,c;float x1,x2,t;for(int m=0;m<=i;m++){a=arr[m][0];b=arr[m][1];c=arr[m][2];if(a==0){if(b==0){if(c==0){printf("no answer!");fprintf(fp,"%s\n","no answer!");continue;}else{printf("no answer!");fprintf(fp,"%s\n","no answer!");continue;}}else if(c==0){x1=0;x2=-c/a;fprintf(fp,"%f %f\n",x1,x2);continue;}else{printf("no answer!");fprintf(fp,"%s\n","no answer!");continue;} }else if(b==0){if(c=0){x1=x2=0;fprintf(fp,"%f %f\n",x1,x2);continue;}else if(c<0){printf("no answer!");fprintf(fp,"%s\n","no answer!");continue;}else if(c>=0){x1=sqrt(-c/a);x2=sqrt(c/a);fprintf(fp,"%f %f\n",x1,x2);continue;} }else if(c==0){x1=0;x2=-b/a;fprintf(fp,"%f %f\n",x1,x2);continue;}else{t=(b*b-4*a*c);if(t<0){printf("no answer!");fprintf(fp,"%s\n","no answer!");continue;}else{x1=((-b-sqrt(b*b-4*a*c))/2*a);x2=((-b+sqrt(b*b-4*a*c))/2*a);fprintf(fp,"%f %f\n",x1,x2);continue;}}}loop:fclose(fp);return 0;}
#include<stdio.h>#include<math.h>#include<stdlib.h>#include<time.h>struct student{int num;float score[6];}stu[30]={0},*p;int main(){srand((unsigned)int(NULL));int i,j,k;for(i=0;i<30;i++){k=i;p=&stu[i];p->num=++k;for(j=0;j<5;j++){p->score[j]=rand()%50+50;p->score[5]+=p->score[j];}}printf("学号成绩1 成绩2 成绩3 成绩4 成绩5 总分\n");for(i=0;i<30;i++){p=&stu[i];printf("%2d ",p->num);for(j=0;j<6;j++){printf("%8.2f",p->score[j]);}printf("\n");}//打印成绩struct student temp;for(i=0;i<29;i++){k=i;for(j=i+1;j<30;j++){if(stu[k].score[5]<stu[j].score[5]){k=j;} }if(k!=i){temp=stu[i];stu[i]=stu[k];stu[k]=temp;}}printf("前十名的成绩是:\n");for(i=0;i<10;i++){p=&stu[i];printf("%2d ",p->num);for(j=0;j<6;j++){printf("%8.2f",p->score[j]);}printf("\n");}//打印前十名成绩if(stu[9].score[5]==stu[10].score[5]){printf("10 ");for(j=0;j<6;j++){printf("%8.2f",stu[10].score[j]);}printf("\n");}//并列第十for(i=0;i<30;i++){p=&stu[i];for(j=0;j<5;j++){if(p->score[j]<80){printf("学号为%d的同学第%d门功课为%.2f低于80分\n",p->num,j+1,p->score[j]);}}} return 0;}
#include<stdio.h>#include<math.h>#include<stdlib.h>#include<time.h>int main(){int n,k;int cnk(int n,int k);printf("请输入n,k:");scanf("%d,%d",&n,&k);printf("%d\n",cnk(n,k));return 0;}int cnk(int n,int k){int s;if(n==k||k==0){s=1;}else{s=cnk(n-1,k-1)+cnk(n-1,k);}return s;}
1
#include "stdio.h"#include "stdlib.h"int main(){float qb(int n, float x);int n, i;float x,sum;printf("请输入n,x:");scanf("%d,%f", &n,&x);FILE *fp;if((fp = fopen("tdat.txt","w")) == NULL) {printf("error");exit(0);}for(i = 0; i <= n; i++) {sum = qb(i, x);printf("T%d(%.2f)=%.2f\n",i,x,sum);fprintf(fp,"T%d(%.2f)=%.2f\n",i,x,sum);} fclose(fp);return 0;}float qb(int n,float x){float s;if(n == 0) s = 1;else if(n==1) s = x;else if(n>=2) s = (2*x*qb(n-1,x)- qb(n-2,x));return s;}
2
#include "stdio.h"#include "stdlib.h"int main(){int a,b,t;char c;printf("输入算式：");scanf("%d%c%d",&a,&c,&b);printf("%d%c%d=",a,c,b);switch(c){case'+':t=a+b;break;case'-':t=a-b;break;case'*':t=a*b;break;case'/': if(b==0){printf("\n0不能为分母! "); return 0;}t=a/b;break;case '%':t=a%b; break;default:printf("请输入合法的双目算术运算符!");return 0;}printf("%d",t);return 0; }
3
#include "stdio.h"#include "stdlib.h"int main(){int a[5][5]={{11,4,2,7,8},{5,9,23,1,25},{3,22,21,18,15},{17,16,24,12,6},{13,10,19,20,14}};int i, j;int k;int m, n,flag=1;for(i = 0; i < 5; i++) {flag=1;k = a[i][0]; m = i; n = 0;for(j = 1; j < 5; j++) {if(a[i][j] < k) {k = a[i][j];m = i; n = j; //行最小的数字} } //检查是不是列最小的数字for(j = 0; j < 5; j++) {if(a[j][n] < k){flag=0;}} if(flag)printf("%d(%d,%d) ", k, m+1, n+1);} return 0;}
#include "stdio.h"#include "stdlib.h"#include"math.h"int main(){int a, b, c;int i;float t;FILE *fp;if((fp = fopen("data.txt", "w")) == NULL) {printf("error");exit(0);}for(i=0;i<10;i++) {printf("请输入第%d组a, b, c:", i);scanf("%d,%d,%d", &a,&b,&c);float hs(int a,int b,int c);t = hs(a, b, c);printf("T%d:%f\n",i,t);fprintf(fp,"%d,%d,%d,%f\n",a,b,c,t);}fclose(fp);return 0;}float hs(int a,int b,int c) {float t;t = ((4.25*(a+b)+log(a+b+sqrt(a+b)+1/(a+b)))/(4.25*c + log(c + sqrt(c) + 1/c)));return t;}
#include "stdio.h"#include "stdlib.h"int main(){int n;printf("请输入一个自然数：");scanf("%d", &n);int m[10], i = 0, j, flag = 1, k;while(n!= 0) {m[i++] = n % 10;for(j = 0; j < i-2; j++) {for(k = 1; k < i-1; k++) {if(m[j] > m[k]) {flag = 0;if(flag==0){printf("不是降序数");return 0;}}} } n = n/10;}if(flag == 1) printf("是降序数");return 0;}
3
#include "stdio.h"#include "stdlib.h"#include"math.h"int main(){float fx(float x);float f2x(float x);float x = - 1, y = 0;while(fabs(x - y) > 1e - 6) {y = x;x = x - fx(x) /f2x(x);}printf("%f\n", x);return 0;}float fx(float x){float f;f = pow(x, 41) + pow(x, 3) + 1;return f;}float f2x(float x){float f;f = 41*pow(x, 40) + 2*pow(x, 2);return f;}
1
#include "stdio.h"#include "stdlib.h"int main(){int x, n;printf("请输入x,n的值：");scanf("%d,%d", &x, &n);int xn(int x, int n);int s;s = xn(x, n);printf("%d的%d次方是%d\n", x, n, s);return 0;}int xn(int x,int n){int s;if(n == 1) {s = x;}else if(n > 1) {s = x*xn(x, n - 1);}return s;}
2
#include "stdio.h"#include "stdlib.h"int main(){int i,j,k,a[52],count=0;for(i=0;i<52;i++){a[i]=(i+4)/4;//printf("a[%d]= %d\n",i,a[i]);}for(i=1;i<52;i++){k=i+1;for(j=i;j<52&&a[j]!=-1;j++){if(a[j]%k==0){a[j]=-1;}}}for(j=0;j<52&&a[j]!=-1;j++){//printf("a[%d]=%d\n",j,a[j]);count++;} printf("%d\n",count);return 0;}
#include "stdio.h"#include "stdlib.h"int main(){FILE *fp;if((fp=fopen("a1","w"))==NULL){printf("error");exit(0); }int ss(int n);for(int i=2;i<=298;i++){if(ss(i)&&ss(i+2)){fprintf(fp,"%d %d\n",i,i+2);printf("%d %d\n",i,i+2); }}fclose(fp);return 0;}int ss(int n){int i;int flag=1;for(i=2;i<n;i++){if(n%i==0){return flag=0;}}return flag=1;}
