Question

C语言。猜数字的。if函数没作用？哪里加停止命令？

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

#define NO 0
#define YES 1

main()
{
int guess_value=-1;
int number;
int nbr_of_guesses;
int done=NO;

printf("Getting a Radom number:");

srand((unsigned)time(NULL));
number=rand();
nbr_of_guesses=0;

getchar();

while(done=NO)
{
printf("\nPick a number between 0 and %d>",RAND_MAX);
scanf("%d",&guess_value);

nbr_of_guesses++;

if(guess_value==number)
{
done=YES;
}
else
if(guess_value>number)
{
printf("\nYou guesses hight");
}
else
{
printf("\nYou guesses low");
}
}

printf("\n\nCongratulation!You guessed right in %d Guesses!",nbr_of_guesses);
printf("\n\nThe number was %d\n\n",number);

getchar();
return 0;
}

Answer 1

while(done=NO)
while的条件表达式应该为while（done==NO）
要是按照你的写法，done=NO这个表达式的值永远为NO，也就是说while语句永远不会被执行。

Answer 2

else cout<<0;