C语言如何判断一个整数是奇数还是偶数

#include<stdio.h>int main(){int a = 0;printf("请输入一个整数：");scanf("%d",&a);int b = a%2;if(1 == b||-1 == b)printf("您输入的数为奇数\n");else if(0 == b)printf("您输入的数为偶数\n");elseprintf("输入错误\n");return 0;}