01:判断数正负
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n;
cin>>n;
if(n>0)
{
cout<<"positive"<<endl;
}
else if(n<0)
{
cout<<"negative"<<endl;
}
else
{
cout<<"zero";
}
}
02:输出绝对值
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
float n;
cin>>n;
printf("%.2f",fabs(n));
}
03:奇偶数判断
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n;
cin>>n;
if(n%2)
{
cout<<"odd";
}
else
{
cout<<"even";
}
}
04:奇偶ASCII值判断
#include<iostream>
using namespace std;
int main()
{
char n;
n=getchar();
if((int)n%2)
{
cout<<"YES";
}
else
{
cout<<"NO";
}
}
/*
WA了两发才反应过来cin不能读空格
*/
05:整数大小比较
#include<iostream>
using namespace std;
int main()
{
int x,y;
cin>>x>>y;
if(x<y)
{
cout<<"<";
}
else if(x>y)
{
cout<<">";
}
else
{
cout<<"=";
}
}
06:判断是否为两位数
#include<iostream>
using namespace std;
int main()
{
int a;
cin>>a;
if(10<=a&&a<=99)
{
cout<<1;
}
else
{
cout<<0;
}
}
07:收集瓶盖赢大奖
#include<iostream>
using namespace std;
int main()
{
int a,b;
cin>>a>>b;
if(a>=10||b>=20)
{
cout<<1;
}
else
{
cout<<0;
}
}
08:判断一个数能否同时被3和5整除
#include<iostream>
using namespace std;
int main()
{
double a;
cin>>a;
if(!((long long)a%15))
{
cout<<"YES";
}
else
{
cout<<"NO";
}
}
09:判断能否被3，5，7整除
#include<iostream>
using namespace std;
int main()
{
double a;
cin>>a;
if(!((long long)a%105))
{
cout<<"3 5 7";
}
else if(!((long long)a%15))
{
cout<<"3 5";
}
else if(!((long long)a%21))
{
cout<<"3 7";
}
else if(!((long long)a%35))
{
cout<<"5 7";
}else if(!((long long)a%3))
{
cout<<3;
}
else if(!((long long)a%5))
{
cout<<5;
}
else if(!((long long)a%7))
{
cout<<7;
}
else
{
cout<<"n";
}
}
10:有一门课不及格的学生
#include<iostream>
using namespace std;
int main()
{
int a,b;
cin>>a>>b;
if((a<60||b<60)&&!(a<60&&b<60))
{
cout<<1;
}
else
{
cout<<0;
}
}
11:晶晶赴约会
#include<iostream>
using namespace std;
int main()
{
int a;
cin>>a;
if(a==1||a==3||a==5)
{
cout<<"NO";
}
else
{
cout<<"YES";
}
}
12:骑车与走路
#include<iostream>
using namespace std;
int main()
{
double a,b,c;
cin>>a;
b=27+23+a/3.0;
c=a/1.2;
if(b<c)
{
cout<<"Bike";
}
else if(b>c)
{
cout<<"Walk";
}
else
{
cout<<"All";
}
return 0;
}
13:分段函数
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x,y;
cin>>x;
if(0<x&&x<5||x<1e-14)
{
y=-1*x+2.5;
}
else if(5<x&&x<10||fabs(x-5)<1e-14)
{
y=2-1.5*(x-3)*(x-3);
}
else
{
y=x/2-1.5;
}
printf("%.3f",y);
return 0;
}
14:计算邮资
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int x,s=8;
char y;
cin>>x>>y;
if(x>1000)
{
s+=(x-1000)/500*4;
if((x-1000)%500)
{
s+=4;
}
}
if(y=='y')s+=5;
cout<<s;
return 0;
}
15:最大数输出
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int a,b,c;
cin>>a>>b>>c;
if(a>=b&&a>=c)
{
cout<<a;
}
if(b>=a&&b>=c)
{
cout<<b;
}
if(c>=b&&c>=a)
{
cout<<c;
}
return 0;
}
16:三角形判断
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int a,b,c;
cin>>a>>b>>c;
int max=a>b? a:b;
max=max>c ? max:c;
int min=a<b?a:b;
min=min<c? min:c;
int mid;
if(max==a&&min==c||max==c&&min==a)mid=b;
if(max==b&&min==a||max==a&&min==b)mid=c;
if(max==b&&min==c||max==c&&min==b)mid=a;
if(min+mid>max&&max-min<mid)
{
cout<<"yes";
}
else
{
cout<<"no";
}
return 0;
}
17:判断闰年
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int a;
cin>>a;
if((a%4==0)&&(a%100))
{
cout<<"Y";
}
else if(a%400==0)
{
cout<<"Y";
}
else
{
cout<<"N";
}
return 0;
}
/*数据范围没到3200，所以不用考虑这个*/
18:点和正方形的关系
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x,y;
cin>>x>>y;
if(fabs(x)>1||fabs(y)>1)
{
cout<<"no";
}
else
{
cout<<"yes";
}
return 0;
}
19:简单计算器
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int x,y,z;
char opt;
cin>>x>>y>>opt;
switch(opt)
{
case '+':
{
cout<<x+y;
break;
}
case '-':
{
cout<<x-y;
break;
}
case '*':
{
cout<<x*y;
break;
}
case '/':
{
if(y==0)
{
cout<<"Divided by zero!";
}
else
{
cout<<x/y;
}
break;
}
default:
cout<<"Invalid operator!";
}
return 0;
}
20:求一元二次方程的根
#include<iostream>
#include<cmath>
using namespace std;
void function(double &a)
{
if(fabs(a)<1e-4)a=0;
}
int main()
{
double a,b,c;
cin>>a>>b>>c;
double temp=b*b-4*a*c;
if(temp<0)
{
double sb = -b / (2*a), xb = sqrt(4*a*c-b*b) / (2*a);
function(sb);
function(xb);
if(xb>0)
{
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi",sb,xb,sb,xb);
}
else
{
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi",sb,-xb,sb,-xb);
}
}
else if(temp>0)
{
double x1 = (-b + sqrt(b*b-4*a*c))/(2*a), x2 = (-b-sqrt(b*b-4*a*c))/(2*a);
double max=x1>x2 ?x1:x2;
double min=x1<x2 ?x1:x2;
function(max);
function(min);
printf("x1=%.5lf;x2=%.5lf",max,min);
}
else
{
double x1 = (-b + sqrt(b*b-4*a*c))/(2*a), x2 = (-b-sqrt(b*b-4*a*c))/(2*a);
function(x1);
printf("x1=x2=%.5lf",x1);
}
return 0;
}
21:苹果和虫子2
#include<iostream>
using namespace std;
int main()
{
long long n,x,y,z;
cin>>n>>x>>y;
if(x)
{
if(y%x)
{
z=n-1-y/x;
}
else
{
z=n-y/x;
}
}
else
{
z=0;
}
if(z<0)z=0;
cout<<z;
return 0;
}
浙公网安备 33010602011771号