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要求如上,经过百度已经完成1,2,3点要求 请大佬帮帮忙完成最后一点。下面附上代码
#include
#include
#include
#define MAXN 35
#define MAX_NAME 256
typedef struct student //学生信息
{
int no;
char name[MAX_NAME];
double C;
double sensor;
double mark_ave;
double mark_tot;
} STUDENT;
/*-----------1输入信息子程序---------*/
void input(STUDENT *data, int *len)
{
int no;
putchar('\n');
printf("%s\n", "请输入新的记录,如果需要退出当前菜单请输入-1.");
printf("%s\n", "格式:\n学号\n");
printf("%s\n", "姓名\tC语言\t传感器");
putchar('\n');
printf("如:\n");
printf("1\n");
printf("小明\t93\t95\n");
scanf("%d", &no);
while(no != -1) {
data[*len].no = no;
scanf("%s%lf%lf",data[*len].name, &data[*len].C, &data[*len].sensor);data[*len].mark_ave=(data[*len].C+data[*len].sensor)/2.0;data[*len].mark_tot=data[*len].C+data[*len].sensor;
(*len)++;
scanf("%d", &no);
}
}
/*---------------2输出信息子程序---------------*/
void output(STUDENT *data, int len)
{
int i;
//system("cls");
printf("%s\t", "学号");
printf("%s\t", "姓名");
printf("%s\t", "c语言");
printf("%s\t", "传感器");
printf("%s\t", "平均分");
printf("%s\t", "总分");
putchar('\n');
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
for (i = 0; i< len; i++)
{
printf("%d\t", data[i].no);
printf("%s\t", data[i].name);
printf("%.1lf\t", data[i].C);
printf("%.1lf\t", data[i].sensor);
printf("%.1lf\t", data[i].mark_ave);
printf("%.1lf\t", data[i].mark_tot);
putchar('\n');
}
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
printf("按回车键继续.");
getchar();
getchar();
}
/*--------------3排序子程序------------*/
void sort(STUDENT *data, int *len)
{
int i,j,k;
STUDENT *temp,t;
temp=&t;
for (i=0; i
for (k=i, j=i+1; j
if (data[k].mark_ave < data[j].mark_ave)
{
k=j;
}
if (k != i) {
*temp = data[i];
data[i] = data[k];
data[k] = *temp;
}
}
}
/*--------------------4搜索子程序-----------------------*/
void find(STUDENT *data, int len)
{
int find_no, result ;
int i;
lab: result=0;
printf("%s\n", "请输入需要查找的学生的学号,退出当前菜单请输入 -1.");
scanf("%d", &find_no);
if (find_no == -1) return; /*exit the fine sub program*/
while( data[result].no != find_no && result < len) result ++;
if (result >= len ) {
printf("%s\n", "未查询到相关信息");
goto lab;
}
else {
//system("cls");
printf("%s\n", "查询信息如下:");
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
printf("%s\t", "学号");
printf("%s\t", "姓名");
printf("%s\t", "C语言");
printf("%s\t", "传感器");
printf("%s\t", "平均分");
printf("%s\t", "总分");
putchar('\n');
printf("%d\t", data[result].no);
printf("%s\t", data[result].name);
printf("%.1lf\t", data[result].C);
printf("%.1lf\t", data[result].sensor);
printf("%.1lf\t", data[result].mark_ave);
printf("%.1lf\t", data[result].mark_tot);
putchar('\n');
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
goto lab;
}
}
/*-----------------5插入子程序-------------*/
void insert(STUDENT *data, int *len)
{
int no, pos;
double C, sensor, mark_ave, mark_tot;
int i;
char name[MAX_NAME];
lab: printf("%s\n", "输入新的记录,退出当前菜单请输入-1.");
printf("%s\n", "格式:学号\t姓名\tC语言\t传感器");
scanf("%d", &no);
if (no == -1) return;
data[*len].no = no;
scanf("%s%lf%lf%lf", name, &C, &sensor);
mark_ave=(C+sensor)/2.0;
mark_tot=C+sensor;
pos = 0;
while ((data[pos].mark_ave < mark_ave) && (pos < *len) )
pos ++;
for (i = *len-1; i >= pos; i--)
data[i+1] = data[i];
data[pos].no = no;
strcpy(data[pos].name, name);
data[pos].C = C;
data[pos].sensor = sensor;
data[pos].mark_ave = mark_ave;
data[pos].mark_tot = mark_tot;
(*len)++;
goto lab;
}
/*-------------删除子程序--------------*/
void delete_item(STUDENT *data, int *len)
{
int no, i, pos;
lab: pos=0;
printf("%s\n", "输入需要删除的学生的学号,退出当前菜单请输入-1.");
scanf("%d", &no);
if (no == -1) return;
while( (data[pos].no != no) && (pos < *len) ) pos = pos +1;
if (pos >= *len) {
printf("%s\n", "未找到需要删除的学生");
goto lab;
}
else {
for (i = pos+1;i < *len; i++)
data[i-1] = data[i];
*len = *len -1;
if (*len == 0) {
printf("%s\n", "没有任何记录,请按回车键返回.");
getchar();
getchar();
return;
}
goto lab;
}
}
//---------------统计子程序------------
void stat1(STUDENT *data, int *len)
{
int no_59=0, no_69=0, no_79=0, no_89=0, no_100=0;
int i;
for (i = 0;i < *len; i++) {
if (data[i].mark_ave <=59) no_59++;
else if (data[i].mark_ave <=69) no_69++;
else if (data[i].mark_ave <=79) no_79++;
else if (data[i].mark_ave <= 89) no_89++;
else no_100++;
}
//system("cls");
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
printf("%s\t", "分数");
printf("%s\t", "0--59");
printf("%s\t", "60--69");
printf("%s\t", "70--79");
printf("%s\t", "80--89");
printf("%s\t", "90--100");
putchar('\n');
putchar('\n');
printf("%s\t", "学生");
printf("%d\t", no_59);
printf("%d\t", no_69);
printf("%d\t", no_79);
printf("%d\t", no_89);
printf("%d\t", no_100);
putchar('\n');
for (i =0; i < 80; i++)
putchar('=');
putchar('\n');
printf("按回车键返回");
getchar();
getchar();
}
//---------------显示信息子程序------------
void paint()
{
int i;
//system("cls");
printf("%55s\n", "学生成绩管理系统\n");
for (i = 0; i < 80; i++)
putchar('=');
putchar('\n');
printf(" 1 输入信息 2 输出信息\n");
printf(" 3 按平均分排序 4 按学号查找\n");
printf(" 5 插入 6 按学号删除\n");
printf(" 7 按平均分输出统计信息 8 保存到文件\n");
printf(" 0 退出\n");
for (i = 0; i<= 79; i++)
putchar('=');
putchar('\n');
printf("%s\n", "请输入各操作对应的序号:");
}
void save(STUDENT *data, int len)//将数据保存到文件
{
int i;
FILE *fp;
fp=fopen("成绩统计表.txt","w");
fprintf(fp,"%s\t", "学号");
fprintf(fp,"%s\t", "姓名");
fprintf(fp,"%s\t", "C语言");
fprintf(fp,"%s\t", "传感器");
fprintf(fp,"%s\t", "平均分");
fprintf(fp,"%s\n", "总分");
fprintf(fp,"========================================================================\n");
putchar('\n');
for (i = 0; i< len; i++)
{
fprintf(fp,"%d\t", data[i].no);
fprintf(fp,"%s\t", data[i].name);
fprintf(fp,"%.1lf\t", data[i].C);
fprintf(fp,"%.1lf\t", data[i].sensor);
fprintf(fp,"%.1lf\t", data[i].mark_ave);
fprintf(fp,"%.1lf\n", data[i].mark_tot);
}
fprintf(fp,"========================================================================\n");
fclose(fp);
printf("文件已保存到\"成绩统计表.txt\"");
getchar();getchar();
}
/*-----------主程序--------------*/
int main()
{
STUDENT data[MAXN];
int len = 0;
char ctrl_ch;
paint();
scanf("%c", &ctrl_ch);
while (ctrl_ch != '0') {
switch(ctrl_ch) {
case '1':
input(data, &len);
break;
case '2':
output(data, len);
break;
case '3':
sort(data, &len);
break;
case '4':
find(data, len);
break;
case '5':
insert(data, &len);
break;
case '6':
delete_item(data, &len);
break;
case '7':
stat1(data, &len);
break;
case '8':
save(data, len);
break;
default:
if (ctrl_ch != '\n') printf("%s\n", "输入错误!");
break;
}
if (ctrl_ch != '\n') paint();
scanf("%c", &ctrl_ch);
}
}