实验1

#include<stdio.h>

int main()
{
    int x;

    printf("please input:\n");
    scanf("%d",&x);

    if (x%2==0)
        printf("even");
    else
        printf("odd");

    getchar();
    return 0;
}

#include<stdio.h>

int main()
{
    int days;

    printf("please input:\n");
    scanf("%d",&days);

    if(days>=1&&days<=5)
        printf("workdays,fighting\n");
    else if(days==6||days==7)
        printf("weekend,relax~\n");
    else
        printf("Oops,not in 1~7\n");

    getchar();
    return 0;
}

#include<stdio.h>

int main()
{
    char ch;

    printf("please input:\n");
    scanf("%c",&ch);

    if(ch>=‘a‘&&ch<=‘z‘)
        ch-=32;
    
    printf("%c",ch);

    getchar();
    return 0;
}

#include <stdio.h>
#include<stdlib.h>

int main()
{
    int n;
    int a[32];
    scanf("%d", &n);

    int i = 0;
    while (n > 0)
    {
        a[i++] = n & 1;
        n = n >> 1;
    }
    while (i--)
    {
        printf("%d", a[i]);
    }
    printf("\n");

    system("pause");
    return 0;
}