flag=1和flag==1為啥結(jié)果不一樣,不都是1嗎
#include <stdio.h>
int main()?
{
int year = 2008;
int month = 8;
int day = 8;
int sum,flag;
switch(month)
{
case 1:sum = 0;break;
case 2:sum = 31;break;
case 3:sum = 59;break;
case 4:sum = 90;break;
case 5:sum = 120;break;
case 6:sum = 151;break;
case 7:sum = 181;break;
case 8:sum = 212;break;
case 9:sum = 243;break;
case 10:sum = 273;break;
case 11:sum = 304;break;
case 12:sum = 334;break;
default:printf("一年只有12個月!");break;
}
sum = sum+day;
if(year%400 ==0 || (year%4==0&&year%100!=0))
{
flag==1;
}
else
{
flag==0;
}
if(flag==1&&month>2)
sum++;
printf("%d年%d月%d日是該年的第%d天!",year,month,day,sum);
return 0;
}
2017-04-06
flag=0;是將右邊的0賦值給flag,此時flag=0
flag==0;這個==是做比較flag是否=0,如果已賦值flag=1,輸出flag仍然是1.