C语言strncat实例 C语言strcat函数实例 C语言strcmp函数实例 C语言strncat实例 /* join_chk.c -- joins two strings, check size first */ #include <stdio.h> #include <string.h> #define SIZE 30 #define BUGSIZE 13 char * s_gets(char * st, int n); int main(void) { char flower[SIZE]; char addon[] = "s smell like old shoes."; char bug[BUGSIZE]; int available; puts("What is your favorite flower?"); s_gets(flower, SIZE); if ((strlen(addon) + strlen(flower) + 1) <= SIZE) strcat(flower, addon); puts(flower); puts("What is your favorite bug?"); s_gets(bug, BUGSIZE); available = BUGSIZE - strlen(bug) - 1; strncat(bug, addon, available); puts(bug); return 0; } char * s_gets(char * st, int n) { char * ret_val; int i = 0; ret_val = fgets(st, n, stdin); if (ret_val) { while (st[i] != '\n' && st[i] != '\0') i++; if (st[i] == '\n') st[i] = '\0'; else // must have words[i] == '\0' while (getchar() != '\n') continue; } return ret_val; } C语言strcat函数实例 C语言strcmp函数实例