摘要： #include "iostream"#include "cmath"using namespace std;void main(){ int n,i; double result=0; cout<<"请输入正整数："<<endl; cin>>n; if(n<1){ cout<<"输入错误！"<<endl; return; } result=1; for(i=2;i<=n;i++) result*=i; cout<<result&l 阅读全文

摘要： 突然发现自己连一元二次方程怎么算的都不知道了。想了半天，拿起笔来才顺手些了给x2+2x+1=0.悔恨啊。#include "iostream"#include "cmath"using namespace std;int main(){ double a,b,c; double delta,x1,x2; int sign,stop; cout<<"输入3个系数a(a!=0),b,c"<<endl; cin>>a>>b>>c; if(a==0){ cout<<&qu 阅读全文

摘要： 1.判断它是否能被2整除。 #include "iostream"using namespace std;int main(){ int input; cout<<"Which number do you want to test?/n"; cin>>input; if(input&1) cout<<"number "<<input<<" is odd."; else cout<<"number "<<i 阅读全文

摘要： #include "iostream"using namespace std;int main(){ int a,b,c; int max,min; cout<<"请输入三个不等整数:/n"; cin>>a>>b>>c; if(a>b){ max=a;min=b; } else;{ max=b;min=a; } if(c>max) cout<<c<<"/t"<<max<<"/t"<<min< 阅读全文