C编程(程序不跳出循环)

Question

这是我的程序的输出。即使条件已经满足，仍然没有跳出循环enter image description here

这是我的程序。第一个 while 循环询问用户是否拥有汽车。

#include <stdio.h>
#include <conio.h>
#define TRANSPORT 1


int main()
{
    char PrivateVehicle;

    printf("DRIVING ANF FLYING CARBON FOORPRINT \n");

    printf("I. LAND \n");

    printf("A. PRIVATE OWNED \n");

    while (TRANSPORT==1)
    {
        do
        {
            printf("Question 1: \n");
            printf("Do you have your own private vehicle? [Y/y]-Yes, [N/n]-No \n");
            printf("Note: Only the letters Y, y for yes and N, n for no would be accepted \n");
            scanf (" %c", &PrivateVehicle);

            if (PrivateVehicle!='Y' && PrivateVehicle!='y' && PrivateVehicle!='N' && PrivateVehicle!='n')
                printf("Inavlid \n");
        } while (PrivateVehicle!='Y' && PrivateVehicle!='y' && PrivateVehicle!='N' && PrivateVehicle!='n');

        if (PrivateVehicle=='Y'|| PrivateVehicle=='y') // should go out of the loop after condition is met
            printf("Y/y\n"); //For checking

        else if (PrivateVehicle=='N'|| PrivateVehicle=='n') // should go out of the loop after condition is met
            printf("N/n\n"); //For checking

        TRANSPORT==0;

    }

    printf("Out"); //For checking

    printf("B. PUBLIC TRANSPORT \n");
}

Answer 1

您不能分配给宏标识符

 TRANSPORT == 0;

(即使使用 =“修复”==)。如果您需要更改某些值，例如，您需要使用变量int TRANSPORT = 0; 而不是 #define 指令。

非终止循环的原因是宏展开后，你有

 while (1==1)

这始终是正确的。