C++第四次作业

<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; line-height: 35px;"><span style="font-size:12px;">一、<span style="color: rgb(51, 51, 51); font-family: Arial; line-height: 26px;">求1000以内所有偶数的和</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; line-height: 35px;"><span style="color: rgb(51, 51, 51); font-family: Arial; line-height: 26px;"><span style="font-size:12px;">1、whlie语句</span></span></p>

#include <iostream>
using namespace std;
int main()
{
int i(0),sum(0);
while (i<=1000)
{
sum+=i;
i=(i+2);
}
cout<<"sum="<<sum<<endl;
return 0;
}

#include <iostream>
using namespace std;
int main()
{
int i(0),sum(0);
do
{
sum+=i;
i=i+2;
}while(i<=1000);
cout<<"sum="<<sum<<endl;
return 0;
}

#include <iostream>
using namespace std;
int main()
{
int i,sum;
sum=0;
for(i=0;i<=1000;i=i+2)
sum=sum+i;
cout<<"sum="<<sum<<endl;
return 0;
}

<span style="font-family:SimHei;font-size:12px;">#include<iostream>
using namespace std;
int main()
{
int i,j,k;
for(i=1;i<10;i++)
{
for(j=1;j<=i;j++)
{
k=i*j;
cout<<j<<"*"<<i<<"="<<k<<"\t";
}
cout<<endl;
}
return 0;
}  </span>

#include<iostream>
using namespace std;
int main()
{
int i,j;
for(i=1;i<=6;i++)
{
for(j=0;j<=6-i;j++)
cout<<" ";
if(i>1)
{
cout<<"*";
for(j=1;j<2*(i-1);j++)
if(i<6)
cout<<" ";
else
cout<<"*";
}
cout<<"*\n";
}
return 0;
}