2nd homewrok:

#include

void main ()
{
int i,j,n;
n=0;
for (i=1; i<=5;i++)
{
for (j=1;j<=i;j++)
{
n++;
printf("%i ",n);
}
printf("\n");
}
}

Result:
1
2 3
4 5 6
7 8 9 10
11 12 13 14



Quite hard to understand The function "FOR"

And i will add my homework about array soon.

Homework makes me mad