C语言strcmp实例

/* quit_chk.c -- beginning of some program */
#include <stdio.h>
#include <string.h>
#define SIZE 80
#define LIM 10
#define STOP "quit"
char * s_gets(char * st, int n);

int main(void)
{
    char input[LIM][SIZE];
    int ct = 0;

    printf("Enter up to %d lines (type quit to quit):\n", LIM);
    while (ct < LIM && s_gets(input[ct], SIZE) != NULL &&
           strcmp(input[ct],STOP) != 0)
    {
        ct++;
    }
    printf("%d strings entered\n", ct);

    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;
}