很久没有写c的程序了，拿个结构体来练练手 没想到编译虽然通过 但是执行报错：Segmentation fault

[view@localhost c]$cat s.c
#include<stdio.h>
typedef struct man{
        char *name;
        int age;
        char phone[12];
        }* pMAN;

int main(){
pMAN a;
strcpy(a->name,"hwt");
a->age=34;
strcpy(a->phone,"18677151934");
printf("a man named %s's age is %s,and phone is %s\n",a->name,a->age,a->phone);
exit(0);
}
[view@localhost c]$cc -o s s.c
[view@localhost c]$./s
Segmentation fault

printf("a man named %s's age is %d,and phone is %s\n",a->name,a->age,a->phone);

这里改了，不过结果还是一样的报错。

自己改好了：
[view@localhost c]$cat s.c
#include<stdio.h>
typedef struct man{
        char name[10];
        int age;
        char phone[12];
        }* pMAN;

int main(){
pMAN a=(pMAN)malloc(sizeof(pMAN));
strcpy(a->name,"hwt");
a->age=34;
strcpy(a->phone,"18677151934");
printf("a man named %s's age is %d,and phone is %s\n",a->name,a->age,a->phone);
exit(0);
}
[view@localhost c]$cc -o s s.c
[view@localhost c]$./s
a man named hwt's age is 34,and phone is 18677151934

谢谢楼上的，那个char *name我改成name[10]才通过

exit（0）没事的。我试过了。

这里声明已经改成name[10]了

一个是实例 一个是指针 大小不一样感觉很正常。
不过确实2个的时候有问题
[view@localhost c]$cat ss.c
#include<stdio.h>
typedef struct man{
        char name[10];
        int age;
        char phone[12];
}* pMAN;

int main(){
    pMAN a=(pMAN)malloc(sizeof(pMAN)), b = (pMAN)malloc(sizeof(pMAN));
    strcpy(a->name,"hwt");
    a->age=34;
    strcpy(a->phone,"18677151934");
    strcpy(b->name,"hwt");
    b->age=34;
    strcpy(b->phone,"18677151934");
    printf("a man named %s's age is %d,and phone is %s\n",a->name,a->age,a->phone);
    printf("a man named %s's age is %d,and phone is %s\n",b->name,b->age,b->phone);
    exit(0);
}
[view@localhost c]$cc -o ss ss.c
[view@localhost c]$./ss
a man named hwt's age is 34,and phone is hwt
a man named hwt's age is 34,and phone is 18677151934

谢谢  明白了