实验一

/*A simple C program*/
#include <stdio.h>
int main (){
	
	printf("my stuno is:202083450092\n  "
	
	
	
	"2020.Will you still love me,when I am no younger and beautiful?\n");
	  return 0;
}

　　

/*循环打印字符*/
#include <stdio.h> 
int main (){
 while(0)
     printf("520");
     
     return 0;
 }

 

#include <stdio.h>
#include <stdafx.h>
    int main(){
    
    int x,y;
    int r1,r2,r3,r4;
    x=1;
    y=2;
    
    r1=x+y;
    r2=x-y;
    r3=x*y;
    r4=x/y;
    
    printf("r1=%d\n",r1);
    printf("r2=%d\n",r2);
    printf("r3=%d\n",r3);
    printf("r4=%d\n",r4);
    return 0;
    }

 

#include <stdio.h>
#include <stdafx.h>
int main(){

float x,y;
float r1,r2,r3,r4;
x=1;
y=2;

r1=x+y;
r2=x-y;
r3=x*y;
r4=x/y;

printf("r1=%f\n",r1);
printf("r2=%f\n",r2);
printf("r3=%f\n",r3);
printf("r4=%f\n",r4);
return 0;
}

 

#include <stdio.h>
#include <stdafx.h>
int main (){
	int answer;
	char words[5000];

	printf ("在家上学让一些人欢喜一些人忧.\n");
	printf ("1.作为一个宅，社恐，觉得这样很好，有网络，自主学习，很ok.\n");
	printf ("2.不喜，不喜，很不喜，眼睛快瞎了，脑壳有点卡....\n ");
	printf ("3.中间派，不知道，说不清.\n");
	printf ("4.其他.../n ");
	printf ("你的选择:    ");
	scanf_s("%d",&answer);
	if(answer==4){
		printf("请补充说明你的想法:\n");
	getchar();
	gets_s(words);
}

printf ("\n");
printf ("当遇到问题时，你会选择:\n");
printf ("1.遇到问题，就解决问题。不懂的，探索式学习，逐个攻破.\n");
printf ("2.遇到问题，不高兴，然后，，，，没有了.\n");
printf ("3.其它....\n");
printf ("你的选择：");
scanf_s("%d,&answer");

	if (answer == 1)
		 printf (":)\n");
	else if (answer==2)
		printf ("这样不能解决问题啊...我们选择1好不好:)\n");
	else if (answer==3){
		 printf ("请补充你的想法:\n");
		 getchar();
		 gets_s(words);
	}

	return 0;
}