实验二

#include "stdafx.h" #include "stdio.h"

int main(int argc, char* argv[]) {  
    int year,days;  
    printf("input the year:");
    scanf("%d",&year);
    if(year/4==0 && year/100 !=0||year/400 ==0)    
        days=29;  
    else   
        days=28; 
    printf("year:%d,mouth:2,days:%d",year,days);   
    return 0; 
}

 

#include "stdafx.h" #include "stdio.h"

int main(int argc, char* argv[]) {  
    char c1, c2,c3,c4,c5;  
    c1=getchar();  
    c2=getchar();  
    c3=getchar();  
    c4=getchar();  
    c5=getchar();  
    putchar(c1); 
    putchar(c2); 
    putchar(c3);
    putchar(c4);
    putchar(c5); 
    return 0; }

 

 

#include "stdafx.h" #include "stdio.h"

int main(int argc, char* argv[]) {   int a,b,c;  scanf("%d %d %d",&a,&b,&c);  if(   printf("等边三角形");}  else if(a*a+b*b=c*c||a*a+c*c=b*b||b*b+c*c=a*a)   printf("直角三角形");  else if (a+b>c && b+c>a && a+c>b){   if(a=b&&b!=c||a=c&&b!=c||b=c&&a!=b)   printf("等腰三角形");   else    printf("能");}  else   printf("不能");  return 0;}

#include "stdafx.h" #include "stdio.h"

int main(int argc, char* argv[]) {  int a,b,c,d;  scanf("%d %d %d",&a,&b,&c);  if(a+b>c && b+c>a && a+c>b){   if(a==b && b==c){    printf("等边三角形");}   else if(a*a+b*b==c*c || b*b+c*c==a*a || a*a+c*c==b*b){    printf("直角三角形");}   else if(a == b  || a==c || b==c ){    printf("等腰三角形");}   else{    printf("一般三角形");}  }  else   printf("否");    return 0; }

 

#include "stdafx.h"
#include "stdio.h"

int main(int argc, char* argv[])
{
    double a,rate,tax,profit;
    scanf("%lf",&a);
    
    if(a<500)
    {
        rate=0.00;}
    if(a>=500 && a<1000)
        rate=0.05;
    if(a>=1000 && a<2000)
        rate=0.08;
    if(a>=2000 && a<5000)
        rate=0.10;
    else
        rate=0.15;
    tax=a*rate;
    profit=a-tax;
    printf("rate=%lf,tax=%lf,profit=%lf",rate,tax,profit);
    
    return 0;
}