c++作业4

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项目一输出完数

#include<iostream>using namespace std;int main(){    int i,j,q,s=0;    for(i=2; i<=1000; i++)    {        for(j=1; j<=i/2; j++)            if(i%j==0)                s=s+j;        if(i==s)            cout<<s<<" ";        s=0;    }}

项目二乘法口诀表

#include <iostream>using namespace std;int main (){    int i,j,k;    for (i=1; i<=9; i++)    {        for (j=1; j<=i; j++)        {            for(j=1; j<=i; j++)                cout<<i<<"×"<<j<<"="<<i*j<<'\t';            cout<<endl;        }    }    return 0;}

项目三输出星号图

#include<iostream>using namespace std;int main(){int i,j;for(i=1;i<=5;i++){for(j=1;j<=6-i;j++)cout<<" ";cout<<'*';for(j=1;j<=2*i-3;j++)    cout<<" ";if(i==1)cout<<endl;if(i>1)cout<<'*'<<endl;}for(i=1;i<=11;i++)cout<<'*';cout<<endl;}

项目四三色球问题

#include<iostream>using namespace std;int main(){int i,j,k;for(i=0;i<=3;i++)for(j=0;j<=3;j++){k=8-i-j;if(k<=6)if(k<=6)cout<<"红球："<<i<<"，白球："<<j<<"，黑球："<<k<<endl;}}

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