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

# ## 图片说明

# 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;

}

回答

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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