第四次上机作业

#include <iostream.h>
int main()
{
int i,n,a,b;
for(n=1;n<=6;n++)
for(a=1;a<=4;a++)
if((4*n+6*a==26)&&(n*(n+a)*(n+2*a)*(n+3*a)==880))
{
b=a;
cout<<n<<" ";
for(i=1;i<20;i++)
cout<<n+i*b<<" ";
}
return 0;
}

#include <iostream.h>
void main()
{
int i,j;
cout<<"     *"<<endl;
for(i=1;i<5;i++)
{
for(j=1;j<=5-i;j++)
cout<<" ";
cout<<"*";
for(j=1;j<=2*i-1;j++)
cout<<" ";
cout<<"*"<<endl;
}
cout<<"***********";
cout<<endl;
}

#include <iostream.h>
int main()
{
int i,x,y,z;
for(x=0;x<=20;x++)
for(y=0;y<=33;y++)
for(z=0;z<=300;z++)
if(5*x+3*y+z/3.0==100&&x+y+z==100)
cout<<"鸡翁"<<x<<"只 "<<"鸡母"<<y<<"只 "<<"鸡雏"<<z<<"只;"<<"\t"<<endl;
return 0;
}