C 循环编译但不起作用的问题

Question

我仍然掌握C循环的窍门。我不知道为什么我的while循环不起作用。

我在这个程序中没有收到任何错误，但正在发生的事情是while循环正在执行else if语句，并且不会返回到if语句。但是，如果您在第一次猜测时输入了正确的数字，它会if。当您在第一次猜测后随时尝试猜测时，它不会通过完整的while循环运行，并且一直显示数字是"低"。我做错了什么？我该如何解决它？

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int ranNumGen();
void Right(int num);  // prompt that you guessed right
void wrong(int guess, int num);  // if else's to tell you to high to low...
void sorry(int num); // prompt for not guessing it right

int main(void)
{
    // Local declarations 
    int num;
    int guess;
    int a;
    // Sets variables  
    num = ranNumGen();
    a = 0;

    // Prompt
    printf("nLets play a game");
    printf("nCan you guess the number I am thinking of?");
    printf("nI will give you a hint its a number between (1 and 20)");
    printf("nI am also going to going to give you five tries.");
    printf("nHave a guess! ");
    printf("Shows number to win %d", num); // shows number to win to check if it works
    scanf_s("%d", &guess);


    while (a < 4)
    {
        (a++);
        if (guess == num)
        {
            Right(num);
            break;
        }
        else if (guess < num || guess > num)
        {
            wrong(guess, num);
        }
    }

    // End promts
    if (guess == num)
    {
        printf("nGoodbyen");
    }
    else
    {
        sorry(num);
    }
    return 0;
}
int ranNumGen()
{
    int range;
    srand(time(NULL));
    range = 20;
    range = (rand() % range + 10) + 1;
    return range;
}
void Right(int num)
{
    printf("nt*******************************************");
    printf("nt* Wow you guessed it! Yep its %d alright. *", num);
    printf("nt*    You won't get it next time! :)       *");
    printf("nt*******************************************");
}
void wrong(int guess, int num)
{
    if (guess > num)
    {
        printf("nYour guess is to high.", guess);
        printf("nTry again: ");
        scanf_s("%d", &guess);
    }
    else if (guess < num)
    {
        printf("nYour guess is to low.", guess);
        printf("nTry again: ");
        scanf_s("%d", &guess);
    }
}
void sorry(int num)
{
    printf("nSorry buddy, you didn't guess it...");
    printf("nThe number was %d better luck next time.n", num);
    return;
}

Answer 1

更改wrong以使用指针参数guess为

void wrong(int *guess, int num)
{
    if ((*guess) > num)
    {
        printf("nYour guess is to high.", *guess);
        printf("nTry again: ");
        scanf_s("%d", guess);
    }
    else if ((*guess) < num)
    {
        printf("nYour guess is to low.", *guess);
        printf("nTry again: ");
        scanf_s("%d", guess);
    }
}

这允许您的外部guess变量值更改wrong