第四次上机作业

一.九九乘法表

#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<10;i++)
{
for(j=1;j<=i;j++)
cout<<i<<"x"<<j<<"="<<i*j<<"  ";
cout<<endl;
}
return 0;
}

#include<iostream>using namespace std;int main(){int i,j,n=5;cout<<"     *"<<endl;for(i=2;i<=n;i++){for(j=0;j<6-i;j++)cout<<" ";cout<<"*";for(j=0;j<2*i-3;j++)cout<<" ";cout<<"*";cout<<endl;}cout<<"***********\n";return 0;}

<pre class="cpp" name="code">include<iostream>using namespace std;int main(){int x,y,z,count=0;for(x=0;x<=20;x++)for(y=0;y<=33;y++)for(z=0;z<=100;z+=3)if(100==5*x+3*y+z/3 && 100==x+y+z){++count;cout<<count<<":"<<x<<" "<<y<<" "<<z<<endl;}return 0;}