闲来无事，又敲一堆代码，嘻嘻
还想看什么，留言哦！
#include<bits/stdc++.h>
using namespace std;
int main()
{
cout<<"智能计算程序"<<endl;
//1
int ao;
char s=2;
while(s==2)
{
cout<<endl;
cout<<"按1判断倍数"<<endl;
cout<<"按2计算面积"<<endl;
cout<<"按3求平方"<<endl;
cout<<"按4年份计算"<<endl;
cout<<"按5计算ASCII码"<<endl;
cout<<"按6四则运算"<<endl;
cout<<"按7判断是否是质数"<<endl;
cout<<"按8判断最大公约数"<<endl;
cout<<"按9智能计算器"<<endl;
cin>>ao;
//判断倍数
if(ao==1)
{
int a;
cout<<"判断倍数"<<endl;
cout<<endl;
cout<<"按1判断是否是3的倍数"<<endl;
cout<<"按2判断是否是5的倍数"<<endl;
cout<<"按3判断是否是6的倍数"<<endl;
cout<<"按4判断是否是7的倍数"<<endl;
cout<<"按5判断是否是8的倍数"<<endl;
cout<<"按6判断是否是9的倍数"<<endl;
cin>>a;
if(a==1)
{
int x;
cout<<"输入一个数" <<endl;
cin>>x;
if(x%3==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
if(a==2)
{
int y;
cout<<"输入一个数" <<endl;
cin>>y;
if(y%5==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
if(a==3)
{
int z;
cout<<"输入一个数" <<endl;
cin>>z;
if(z%6==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
if(a==4)
{
int a;
cout<<"输入一个数" <<endl;
cin>>a;
if(a%7==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
if(a==5)
{
int b;
cout<<"输入一个数" <<endl;
cin>>b;
if(b%8==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
if(a==6)
{
int c;
cout<<"输入一个数" <<endl;
cin>>c;
if(c%9==0)
{
cout<<"YES"<<endl;
cout<<"结束";
}
else
{
cout<<"NO"<<endl;
cout<<"结束";
}
}
}
//计算面积
if(ao==2)
{
int aa;
cout<<"计算面积"<<endl;
cout<<endl;
cout<<"按1计算正方形的面积"<<endl;
cout<<"按2计算长方形的面积"<<endl;
cout<<"按3计算三角形的面积"<<endl;
cout<<"按4计算梯形的面积"<<endl;
cout<<"按5计算平行四边形的面积"<<endl;
cin>>aa;
if(aa==1)
{
int xa;
cout<<"输入1个数（边长）" <<endl;
cin>>xa;
cout<<xa*xa<<endl;
cout<<"结束";
}
if(aa==2)
{
int ya,ya2;
cout<<"输入2个数（长，宽）" <<endl;
cin>>ya>>ya2;
cout<<ya*ya2<<endl;
cout<<"结束";
}
if(aa==3)
{
int za,za2;
cout<<"输入2个数（高，底）" <<endl;
cin>>za>>za2;
cout<<za*za2/2<<endl;
cout<<"结束";
}
if(aa==4)
{
int sa,sa2,sa3;
cout<<"输入3个数（上底，下底，高）" <<endl;
cin>>sa>>sa2>>sa3;
cout<<(sa+sa2)*sa3/2<<endl;
cout<<"结束";
}
if(aa==5)
{
int aaa,aaa2;
cout<<"输入2个数（高，底）" <<endl;
cin>>aaa>>aaa2;
cout<<aaa*aaa2<<endl;
cout<<"结束";
}
}
//求平方
if(ao==3)
{
int aa5;
cout<<"求平方"<<endl;
cout<<endl;
cout<<"按1计算平方"<<endl;
cout<<"按2计算平方根"<<endl;
cin>>aa5;
if(aa5==1)
{
cout<<"输入一个数"<<endl;
int aal;
cin>>aal;
cout<<aal*aal<<endl;
cout<<"结束";
}
if(aa5==2)
{
cout<<"输入一个数"<<endl;
double aa22;
cin>>aa22;
printf("%lf",sqrt(aa22) );
cout<<"结束";
}
}
//年份计算
if(ao==4)
{
cout<<"年份计算"<<endl;
cout<<endl;
cout<<"判断闰年"<<endl;
cout<<"输入年份"<<endl;
int year;
cin>>year;
if(year%4==0&&year%100!=0||year%400==0)
{
cout<<year<<"是闰年"<<endl;
}
else
{
cout<<year<<"不是闰年"<<endl;
}
cout<<"结束";
}
//计算ASCII码
if(ao==5)
{
cout<<"计算ASCII码"<<endl;
cout<<endl;
cout<<"输入一个字母"<<endl;
char ascll;
cin>>ascll;
cout<<ascll<<"的ASCLL码是"<<(int)ascll<<endl;
cout<<"结束";
}
//四则运算
if(ao==6)
{
cout<<"四则运算"<<endl;
cout<<endl;
cout<<"输入两个数 一个运算符(+,-,*,/)"<<endl;
char op;
double num1,num2;
cin>>num1>>num2>>op;
switch(op)
{
case'+':cout<<num1<<op<<num2<<"="<<num1+num2<<endl;break;
case'-':cout<<num1<<op<<num2<<"="<<num1-num2<<endl;break;
case'*':cout<<num1<<op<<num2<<"="<<num1*num2<<endl;break;
case'/':if(num2!=0)cout<<num1<<op<<num2<<"="<<num1/num2<<endl;else cout<<"这两个数相除等于零"<<endl;break;
default:cout<<op<<"不是运算符"<<" "<<"+,-,*,/才是运算符"<<endl;
}
cout<<"结束";
}
//判断是否是质数
if(ao==7)
{
cout<<"判断是否是质数"<<endl;
cout<<endl;
cout<<"输入一个数"<<endl;
int i,n;
cin>>n;
i=2;
while(n%i!=0 && i<n-1)
i++;
if(i>n-1)cout<<n<<"是质数"<<endl;
else cout<<n<<"不是质数"<<endl;
cout<<"结束";
}
//判断最大公约数
if(ao==8)
{
cout<<"判断最大公约数"<<endl;
cout<<endl;
cout<<"输入两个数"<<endl;
int a,b,g;
cin>>a>>b;
g=a>b?b:a;
while (g>1 && (a%g!=0||b%g!=0))
g--;
cout<<a<<"和"<<b<<"的最大公约数是"<<g<<endl;
cout<<"结束";
}
//智能计算器
if(ao=9)
cout<<"智能计算器"<<endl;
cout<<"输入算式"<<endl;
cout<<"示例：1+2"<<endl;
float n1,n2;
char p;
cin>>n1>>p>>n2;
switch(p)
{
case'+':cout<<'='<<n1+n2<<endl;break;
case'-':cout<<'='<<n1-n2<<endl;break;
case'*':cout<<'='<<n1*n2<<endl;break;
case'/':if(n2!=0)cout<<'='<<n1/n2<<endl;else cout<<"除数不可以为0"<<endl;break;
default:cout<<"无效算式"<<endl;
}
cout<<"你要结束吗？结束按1,不按2"<<endl;
cin>>s;
if(s=1) break;
if(s=2);
}
return 0;
}