实验1

#include<stdio.h>
int main()
{
	printf("201983270493");
	return 0;
 } 

　　

#include<stdio.h>
int main()
{
	printf("hello,火星");
	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++=%d\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(1<=days&&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("输入一个字符:\n");
  	scanf("%c",&ch);
  	
      
  	if(61<=ch&&ch<=122)  
  		ch=ch-32;
                
  	
  	printf("%c\n",ch);
  	
  	return 0;
  }