2020-06-25 10:42

# c语言编程，程序编译没错，运行弹出debug，问题在排序模块，把主函数的排序注释掉后不会弹出debug

## # ##

``````# include <stdio.h>
# include <malloc.h>

void input(struct student * stu, int val);
void paixu(struct student * stu, int val);
void output(struct student * stu, int val);

struct student
{
int age;
char name[100];
float score;
};

int main(void)
{
int val;
printf("请输入学生总数：\n");
scanf("%d", &val);
float a = 3.0/10;

struct student * stu = (struct student *)malloc(val*sizeof(struct student *));//分配val个struct student *型动态内存

input(stu, val);//调用输入学生数据的函数

paixu(stu, val);//调用按成绩排序的函数

output(stu, val);//调用输出学生数据的函数

free(stu);//释放学生数据所占用的内存

return 0;
}

void input(struct student *stu, int val)
{
int i;

for(i = 0; i < val; ++i)
{
printf("请输入第%d个学生的信息\n",i+1);

printf("年龄：");
scanf("%d", &stu[i].age);

printf("姓名：");
scanf("%s", &stu[i].name);

printf("分数：");
scanf("%f",&stu[i].score);
}
return;
}

void paixu(struct student *stu, int val)
{
int i;
int j;
struct student st;

for(i = 0; i < val-1; ++i)//按成绩升序排序
{
for(j = 0; j < val-1-i; ++j)

if(stu[j].score > stu[j+1].score)
{
st = stu[j];
stu[j] = stu[j+1];
stu[j+1] = st;
}

}
return;
}

void output(struct student *stu, int val)
{
int i;

for(i = 0; i < val; ++i)
{
printf("第%d个学生的信息为：\n", i+1);

printf("年龄：%d 姓名：%s 成绩：%f \n", stu[i].age, stu[i].name, stu[i].score);
}
return;
}

``````
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#### 1条回答默认 最新

• qiu_shaofeng 2020-06-25 18:46
已采纳

struct student * stu = (struct student *)malloc(val*sizeof(struct student ));分配val个student结构体大小内存

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