在C语言中判断整数是奇数还是偶数是怎么判断的?
在判断函数中,将输入数值和2进行取余,余数为0的是偶数,否则是奇数;在主函数中通过scanf先让用户输入一个数,然后调用判断函数,判断输入数值奇偶,输出判断信息。
#include<stdio.h>
int IsJiShu(int a)
{ if(a%2==1) return 1;
else if(a%2==0)
return 0; }
int main()
{ int n;
while(scanf("%d",&n)!=EOF)
{ if(IsJiShu(n)) printf("该数是奇数
");
else printf("该数是偶数
");}
return 0;}
运行结果:
扩展资料:
两种判断奇数偶数的方法:
1、求余(%):根据奇数偶数的定义,若整数除以2没有余数,则为偶数,否则为奇数。因此,偶数取余结果为0,奇数取余结果为非零
2、与1相与(&1):一个十进制数字是奇数还是偶数,取决于二进制中最低位那个数是0还是1。与1相与时,只有对应的两个二进位均为1时,结果位才为1(奇数) ,否则为0(偶数)。(参与运算的数以补码方式出现)
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