ref: 844cf5ff2aa2a862b58d2e503e02534e133ad395
dir: /tests/libc/execute/0011-strcat.c/
#include <assert.h> #include <stdio.h> #include <string.h> /* output: testing ok end: */ int main(void) { char *s, buf[40]; puts("testing"); strcpy(buf, "case1:"); s = strcat(buf, "ok"); assert(s == buf); assert(!strcmp(s, "case1:ok")); strcpy(buf, ""); s = strcat(buf, "ok"); assert(s == buf); assert(!strcmp(s, "ok")); strcpy(buf, "case1:"); strcat(buf, ""); assert(s == buf); assert(!strcmp(s, "case1:")); puts("ok"); return 0; }