第二次实验

#include <stdio.h>
int main()
{
    int x=1234;
    float f=123.456;
    double m=123.456;
    char ch=‘a‘;
    char a[]="Hello,world!";
    int y=3 ,z=4;
    printf("%d,%d\n",y,z);
    printf("y=%d, z=%d\n", y,z);
    printf("%8d,%2d\n",x,x);
    printf("%f,%8f,%8.1f,%0.2f,%.2e\n",f,f,f,f,f);
    printf("%lf\n", m);
    printf("%3c\n",ch);
    printf("%s\n%15s\n%10.5s\n%2.5s\n%.3s\n",a,a,a,a,a);
    return 0;
    
 }

#include <stdio.h>
int main() {
    double x,y;
    char c1,c2,c3;
    int a1,a2,a3;
    scanf("%d%d%d",&a1,&a2,&a3);
    printf("%d,%d,%d\n",a1,a2,a3);
    scanf("%c%c%c",&c1,&c2,&c3);
    printf("%c%c%c\n",c1,c2,c3);
    scanf("%lf,%lf",&x,&y);
    printf("%lf,%lf\n",x,y);
    return 0;
}

#include <stdio.h>
int main() {
   char ch;
   ch=‘A‘;
   putchar(ch);
   putchar(ch+32);
   putchar(‘\x41‘);
   putchar(‘\n‘);
   return 0;
}

#include <stdio.h>
int main()
{
   int a,b;
   int t;
   scanf("%d%d",&a,&b);
   if(a>b)
{
    t=a;
    a=b;
    b=t;
}
   printf("a=%d,b=%d",a,b);
   return 0;
}

#include <stdio.h>
int main()
{
   int n;
   printf ("please input a number \n");
   scanf("%d",&n);
   if(n%2==1)
   printf("是奇数");
   else
   printf("是偶数") ; 
   return 0;
}

#include <stdio.h>
int main()
{
   int level;
   printf("输入现在的状态等级(1-5): ");
   scanf("%d",&level);
   if(level==1)
   printf("high翻了\n");
   else if(level==2)
   printf("low爆了\n");
   else
   printf("一言难尽");
   return 0;
}

int main()
{
   int level;
   printf("输入现在的状态等级(1-5): ");
   scanf("%d",&level);
   switch(level)
   {
   case 1:printf("嗨爆了\n");break;
   case 2:printf("low爆了\n");break;
   default:printf("一言难尽\n");

   }   
  return 0;
}

#include <stdio.h>
int main()
{
   char answer;
   printf("输入你的答案: ");
   scanf("%c",&answer);
   switch(answer)
   {
   case ‘A‘:printf("yes,you are right\n");break;
   default:printf("try again\n");
   }   
  return 0;
}