[英]C scanf() issues?
在這個簡單的猜數游戲中,scanf()在main中第二次沒有工作。 如果有人能解釋為什么不起作用以及如何解決它,我將非常感激。 有關如何清理此代碼的任何提示? 謝謝!
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int guessed = 0;
int guesses = 0;
int total_guesses = 0;
int range_top = 1;
int generate_random_number()
{
srand(time(NULL));
return (rand() % range_top);
}
void take_guess(int num)
{
int guess;
printf("what is your guess: ");
scanf("%i",&guess);
if(guess == num)
{
guessed = 1;
}
else if(guess>num)
{
printf("Your guess was too high,\n");
}
else
{
printf("Your guess was too low.\n");
}
}
int main(void)
{
printf("This is a game in C\n");
printf("Would you like to play? (y/n): ");
char play;
scanf("%c",&play);
while(play == 'y')
{
printf("I am thinking of a number between 0 and %i\n",range_top);
int num = generate_random_number();
while(guessed ==0)
{
take_guess(num);
guesses++;
}
printf("It took you ");
printf("%i",guesses);
printf(" guesses to win.\n");
printf("Would you like to play again? (y/n): ");
scanf("%c",&play);
guessed = 0;
guesses = 0;
total_guesses+=guesses;
}
printf("goodbye!");
}
這是一個經典的新手錯誤。
scanf("%c",&play);
讀取take_guess
的數字后,將讀取輸入流中take_guess
。
使用
scanf(" %c",&play);
代替。
如果格式說明符中的%c
前面有空格字符,則該函數將從輸入流中讀取第一個非空白字符。 否則,它將從輸入流中讀取第一個可用字符。
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