Loop in C++ 1 to 40 numbers

Nested For Loop In C++ 

Use for loop to print number (1 to 40)  5 on a line.

#include<iostream.h>
void main ()
{
int num=1;
for(int i=1; i<=8; i++)
{
for(int j=1; j<=5; j++)
{
cout<<num;
num++;
}
cout<<endl;
}

}

OutPut