实验1C语言开发环境使用和数据类型、运算符、表达式

#include<stdio.h>

int main()

{

     printf("201983270553");

     return 0;

}

#include<stdio.h>

int product(int,int);

int main(void)
{
       int x,y,s;

       scanf("%d%d",&x,&y);

       s=product(x,y);

       printf("The mul is:%d",s);

       return 0;
}

int product(int a,int b)
{
        int mul;

        mul=a*b;

        return mul;

}

#include<stdio.h>

int main()
{ 

      int a=5,b=7,c=100,d,e,f;

      d=a/b*c;
     
      e=a*c/b;

      f=c/b*a;

      printf("d=%d,e=%d,f=%d\n",d,e,f);

      return 0;
}

#include<stdio.h>

int main()
{
        int a=5,b=8;

        printf("a++=%\n",a++);

        printf("a=%d\n",a);

        printf("++b=%d\n",++b);

        printf("b=%d\n",b);
      
        return 0;

}

#include<stdio.h>

int main()

{
        int a=5,b=8,c=8;

        printf("%d,%d,%d,%d\n",a==b&&a==c,a!=b&&a!=c,a>=b&&a>=c,a<=b&&a<=c);

        printf("%d,%d\n",a<=b||a>=c,a==b||b==c);

        printf("%d,%d,%d,%d\n",!(a==b),!(a>=b),!(a>=c),!(a<=b));

        return 0;
}

#include<stdio.h>

int main()
{
        int x;

        printf("输入一个整数:\n");

        scanf("%d",&x);

        if(x%2==1)

                printf("是奇数");

        else
                printf("是偶数");

        return 0;
}

#include<stdio.h>

int main()
{
        int days;

        printf("输入一个整数：\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("Ooops,not in 1~7\n");

        return 0;
}

#include<stdio.h>

int main()
{

        char ch;

        printf("输出一个字符：\n");

        scanf("%c",&ch);

        if(ch>='a'&&ch<='z')

        ch=ch-('a'-'A');

        printf("%c\n",ch);

        return 0;
}