1 int strcpy1(char *brr, char *crr) 2 { 3         int i=0; 4         while(*(crr+i)) 5         { 6                 *(brr+i) = *(crr+i); 7                 i++; 8         } 9 10         *(brr+i) = ‘\0‘;  //写到了*(crr+i)造成段错误11 }12 13 int main()14 {15         int i;16         char *arr = "hello!";17         char data[1024] = {0};18 19         int (*p)(char *, char *) = strcpy1;20         p(data, arr);21 22         printf("%s \n", data);23 }

 1 #include <stdio.h> 2  3 char * strcpy1(char *brr, char *crr) 4 { 5         int i=0; 6         while(*(crr+i)) 7         { 8                 *(brr+i) = *(crr+i); 9                 i++;10         }11 12         *(brr+i) = ‘\0‘;  //写道了*(crr+i)13         return brr;14 }15 16 int main()17 {18         int i;19         char *arr = "hello!";20         char data[1024] = {0};21 22         char *(*p)(char *, char *) = strcpy1;23         char *red = p(data, arr);24 25         printf("%s \n", red);26 }

#include <stdio.h>#include <string.h>char *fox(char *dest, char *src){        int i, j;        for(i=strlen(src)-1, j=0;i>=0; i--,j++)//sizeof(src)是四个字节，src是指针        {                *(dest+j) = *(src+i);        }        *(dest+j) = ‘\0‘;        return dest;}int main(){        char *p = "hello!";        char data[1024] = {0};        char *(*fp)(char *, char *);        fp = fox;        char *red = fp(data, p);        printf("%s \n", red);}