c++作业4

#include<iostream>
using namespace std;
int main()
{
double m=100000,f=0.01,d,sum=0;
for(d=1;d<=30;d++)
{
sum=sum+f;
cout<<"富翁第"<<d<<"天给陌生人的钱为"<<f<<endl;
cout<<"陌生人第"<<d<<"天给富翁的钱为"<<m<<endl;
f=f*2;
}
cout<<"陌生人最终给富翁的钱为"<<30*m<<endl;
cout<<"富翁最终给陌生人的钱为"<<sum<<endl;
return 0;
}

#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<=9;i++)
{
for(j=1;j<=i;j++)
if(i==j)
cout<<j<<"*"<<i<<"="<<j*i<<"\n";
else
cout<<j<<"*"<<i<<"="<<j*i<<"\t";
}
return 0;
}

#include <iostream>

using namespace std;

int main()
{
int i,j;
for(i=0;i<=0;i++)
{
for(j=1;j<=5;j++)
cout<<" ";
cout<<"*"<<endl;
}
for(i=1;i<=4;i++)
{
for(j=1;j<=5-i;j++)
cout<<" ";
cout<<"*";
for(j=1;j<=2*(i)-1;j++)
cout<<" ";
cout<<"*";

cout<<endl;
}
for(j=1;j<=11;j++)
cout<<"*";

return 0;
}