摘要：
#includechar *mystrcpy(char *dest,char *src);unsigned int mystrlen(char *src);char *mystrcat(char *dest,char *src);int main(int argc, const char *argv[]){ char str[20] = { 0 }; char *p = NULL; p = "hello"; char *p1 = "world"; mystrcpy(str,p); mystrcat(str,p1); puts(str); prin... 阅读全文