c - 如何在用户输入 "quit"时结束程序

Question

如何在用户输入“退出”时结束程序？我在循环之前和循环内尝试了一个 if 语句。我对编程很陌生，我无法弄清楚这一点让我很困扰。我什至尝试了一个 do while 循环，但它根本不起作用。

int main()
{
    char word[30];
    char yn;
    int loopcount;
    yn=0;
    loopcount=0;
    printf("Enter a word:");
    scanf(" %s", word);
    printf("Would you like to change the word? y=yes, n=no \n");
    scanf(" %c", &yn);
    if (yn=='n')
    {
        return 0;
    }

    while(yn>0)
    {
        printf("Enter a new word: \n");
        scanf(" %s", word);
        printf("New word is: %s \n");
        loopcount= loopcount+1;
        printf("You have changed the word %d times.\n", loopcount);
        printf("Would you like to change the word? y=yes, n=no\n");
        scanf(" %c", &yn);

        if (yn=='n')
        {
            return 0;
        }


        return 0;
    }

    return 0;
}

Answer 1

使用strcmp()

scanf(" %s", word);
if (strcmp(word, "quit") == 0) {
    return 0;
}