#include<stdio.h>
main()
{
int x=0,y=0;
char i='y',j='\0';
printf("hello world!\n");
while(i=='y')
{
printf("enter x and y\nx=");
scanf("%d",&x);
printf("y=");
scanf("%d",&y);
if (x==y)
printf("x=y, no maximum.\n");
else if (x>y)
printf("x>y, x is the maximum.\n");
else
printf("x<y, y is the maximum.\n");
printf("enter 'y' or 'Y' to continue.\nand press others to quiet...\nyour choose is...");
scanf("%c",&j);
if (j=='y')
i='\0';
printf("\n*************************\n");
}
}
为什么是死循环？？
scanf（"%c"，&j）;
怎么没有执行到？？
求解。
[code="java"]#include
int main()
{
int x=0,y=0;
char i='y',j='\0';
printf("hello world!\n");
while(i=='y')
{
printf("enter x and y\nx=");
scanf("%d",&x);
getchar();
printf("y=");
scanf("%d",&y);
getchar();
if (x==y)
printf("x=y, no maximum.\n");
else if (x>y)
printf("x>y, x is the maximum.\n");
else
printf("x<y, y is the maximum.\n");
printf("enter 'y' or 'Y' to continue.\nand press others to quiet...\nyour choose is...");
scanf("%c",&j);
getchar();
if (j != 'y' && j != 'Y')
i='\0';
printf("\n*************************\n");
}
}
[/code]
这样就可以了，原因是scanf过滤空格、制表符、回车，当你输入数字的时候敲了回车。getchar就读到了你最后敲的那个回车符了。
你定义了i=='y'这个条件
while(i=='y')
说明只要i=='Y'里面的语句就执行 而你定义的条件又满足这个
所以是死循环