1 #include <stdio.h> 2 #include <string.h> 3 #include <malloc.h> 4  5 #define TRUE 1 6 #define  FALSE 0 7  8 char *  9 strca(char *, char *);10 11 char *12 join1(char *, char *);13 14 int15 main(void) {16     char *a = "你好";17     char *b = "de我";18     printf("%s\n", strca(a, b));19 }20 21 char *22 strca(char *des,  char *src) {23     char *r = (char *)malloc(sizeof(strlen(des)) + sizeof(strlen(src)) + 1);    //尾部存放‘\0‘中终止符.24     if(!r) {25         printf("out of memory!\n");26         return FALSE;27     }28     char *tmp = r;    //保存首地址.29 /*    while( *r++ = *des++ )30     */    ;31 32     while( *des )33         *r++ = *des++;34     35     while( *r++ = *src++ )36         ;37     return tmp;38 }