程序无法识别 if-else 语句中的字符输入

Program not recognizing character inputs in if-else statements

我调试程序发现,虽然你输入了一个选项,比如Y/y/n/NH/h/l/L,但是if函数无法识别输入,它会跳过。感谢您的任何建议! RNG 运行正常,对我来说似乎一切都很好。

#include <stdio.h>
#include <time.h>



 int main(){
char startAnswer[1];
char gameAnswer[1];
int i;
int r;
int t;
int compare;
srand(time(NULL));

printf("Do you want to play a game? Y/N. \n");
scanf(" %c", &startAnswer);
start:
if (startAnswer == 'y' || 'Y'){
    goto game;
}
else if (startAnswer == 'n' || 'N'){
    printf("Game will now exit.\n");
}
else {
    printf("You entered an invalid answer, try again.\n");
    goto start;
}
game:
printf("There will be ten numbers calculated.\n");
printf("Try to guess what the numbers are before\n");
printf("they are displayed. One at a time.\n\n");
for(i = 0; i < 12; i++){

    randGen:
    r = ( rand() % 9 ) + 1;
    t = ( rand() % 9 ) + 1;
    if(t == r){
        goto randGen;
    }

    printf("Is the next number higher or lower than %d\n\n" , r);
    scanf(" %c" , &gameAnswer);
 //ignore       (r > t) ? (compare = 0) : (compare = 1);
    if (r > t){
        compare = 1;
    }
    else{
        compare = 0;
    }



    if (gameAnswer == ('H' || 'h')){
        if (compare == 1){
            printf("You win this round!");
            goto randGen;
        }
    }
    else if (gameAnswer == ('L' || 'l')){
        if (compare == 0){
            printf("You win this round!");
            goto randGen;
        }
    }
    else if (gameAnswer != ('l' || 'L' || 'h' || 'H')){
        if (compare == 0){
            printf("Please Enter H/L for higher/lower answer.\n\n");
            goto randGen;
        }
    }
    else{
            printf("You lost this round.");
            goto randGen;
    }
    r = t;

}



}

您是否在阅读选项之前使用 fflush(stdin)?这将清理您的缓冲区。

在你的代码中

if (gameAnswer == ('H' || 'h'))

并不像你想象的那样。将其更改为

if ((gameAnswer[0] == 'H')  || (gameAnswer[0] == 'h'))   //gameAnswer is an array

类似地,对于所有其他事件。

此外,

scanf(" %c", &startAnswer);

应该是

scanf(" %c", &startAnswer[0]);

同样

注:

  1. 如果您不需要 array不要使用。坚持单一变量。

  2. main()的推荐签名是int main(void).

  3. 只是一个建议,请尽量避免goto语句。这不是一个好的做法。尝试编写和使用函数。

if (startAnswer == 'y' || 'Y'){

没有。这不是如何链接条件。 You are translating broken English into C++.

有很多问题:

其中之一是:

char startAnswer[1];
char gameAnswer[1];

应该是

char startAnswer;
char gameAnswer;

你的编译器肯定在这里发出了警告。

您的代码有 2 个问题:

  1. if条件,比如这个:if (gameAnswer == ('H' || 'h')),本来应该是:if (gameAnswer == 'H' || gameAnswer=='h')

  2. charschar startAnswer[1]; char gameAnswer[1]; 要么这样做:char startAnswer; char gameAnswer; 要么:在代码中使用 gameAnswer[0] 而不是 gameAnswer

最后,对于 srandrand,您需要包含 stdlib 库,只需添加此行:#include<stdlib.h>http://www.cplusplus.com/reference/cstdlib/srand/