c 字符串的拼接.

 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 int
15 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 }