C语言while循环lives计数器为负未退出问题求助

你的问题核心是while循环逻辑错误，导致lives降到0后没及时终止答题，还会继续减成负数，具体问题和修复方法如下：

问题原因 #

1. 你把两道题的代码都塞进了一次循环执行里——哪怕第一题答错后lives变成0，代码还是会继续执行第二题，自然会让lives再减1变成负数。
2. 循环里答题结束后直接设置ingame=0，导致循环只会执行一次，完全没起到“lives不够就终止游戏”的控制作用。
3. while条件里的lives<=3是多余的，lives初始是3只会递减，这个条件不会限制任何逻辑。

修复方案 #

1. 每答完一题就检查lives是否为0，是的话立即终止循环，不再执行后续题目。
2. 移除ingame=0的提前赋值，让循环根据lives>0的条件自动控制流程。
3. 去掉多余的lives<=3条件，简化循环判断。

修改后的代码 #

#include<stdio.h>

int main (void) {

    //quiz variables
    int gamestart, ingame = 1;
    int scr1, scr2, scr3, scr4, scr5;
    int ans1, ans2, ans3, ans4, ans5;
    char name[25];
    int total = 0;
    //start of quiz
    printf("--------Hello welcome to the quiz game!--------\n");
    printf("----Press 1 to start the game and 0 to quit----\n");
    scanf("%d", &gamestart);

    //quiz code
    int lives = 3;
    // 简化循环条件，只保留必要控制
    while (ingame == 1 && lives > 0) {
        if (gamestart == 1) {
            // 仅首次进入游戏时输入名字
            static int first_run = 1;
            if (first_run) {
                printf("Enter your first name: ");
                scanf("%s", name);
                printf("Hello %s! Let's start the game...\n", name);
                first_run = 0;
            }
            
            printf("First Question: What does “www” stand for in a website browser?\n");
            printf("1. Whole Wide World    2. Whole Wide Web\n");
            printf("3. World Wide Web      4. World Wide Whole\n");
            
            printf("Enter the number of your answer: ");
            scanf("%d", &ans1);
            switch(ans1){
                case 1:
                    printf("Wrong Answer. You gain 0 points");
                    scr1 = 0;
                    break;
                case 2:
                    printf("Wrong Answer. You gain 0 points");
                    scr1 = 0;
                    break;
                case 3:
                    printf("Correct Answer! You gain 5 points!");
                    scr1 = 5;
                    break;
                default:
                    printf("Wrong Answer. You gain 0 points");
                    scr1 = 0;
                    break;
            }
            total += scr1;
            if (scr1 == 0 )
                lives--;
            printf("\nLives left: %d", lives);
            printf("\nYour total score this round is %d ", total);
            printf("\n");

            // 检查lives是否耗尽，是则直接结束游戏
            if (lives <= 0) {
                printf("Game over! You have no lives left.\n");
                ingame = 0;
                break;
            }

            printf("\nNext Question...\n");
            printf("What is \"cynophobia\"?\n");
            printf("1. Fear of dogs        2. Fear of cats\n");
            printf("3. Fear of cyanide     4. Fear of the color blue\n");
            printf("Enter the number of your answer: ");
            scanf("%d", &ans2);
            switch(ans2){
                case 1:
                    printf("Correct Answer! You gain 5 points!");
                    scr2 = 5;
                    break;
                case 2:
                    printf("Wrong Answer. You gain 0 points");
                    scr2 = 0;
                    break;
                case 3:
                    printf("Wrong Answer. You gain 0 points");
                    scr2 = 0;
                    break;
                default:
                    printf("Wrong Answer. You gain 0 points");
                    scr2 = 0;
                    break;
            }
            total += scr2;
            if (scr2 == 0)
                lives--;
            printf("\nLives left: %d", lives);
            printf("\nYour total score this round is %d ", total);

            // 答题结束后终止循环
            ingame = 0;
        } else if (gamestart == 0) {
            ingame = 0;
        } else {
            printf("Invalid Keyword\n");
            printf("----Press 1 to start and 0 to quit----\n");
            scanf("%d", &gamestart);
        }
    }
    printf("\n\n\nThank you!");
    return 0;
}

额外说明 #

• 新增static int first_run避免重复让用户输入名字，符合正常游戏流程。
• 每道题后都检查lives状态，确保lives耗尽时立即终止游戏，不会继续执行后续题目。

内容的提问来源于stack exchange，提问作者Ronin