例3-1

#include<stdio.h>
int main(void)
{
    int mynumber=38;
    int yournumber;

    printf("Input your number:");
    scanf("%d",&yournumber);
    if(yournumber==mynumber)
        printf("ok!yout are right!\n");
    else
        if(yournumber>mynumber)
            printf("Sorry!your number is bigger than my number!\n");
        else
            printf("Sorry!your number is smaller than my number!\n");

        return 0;
}