Can anybody explain this program?

Question

#include <stdio.h>

#define LEN1 6

#define LEN2 6

int x[2*LEN1-1]={1,2,3,4,5,6,0,0,0,0,0};

int h[2*LEN1-1]={1,2,3,4,5,6,0,0,0,0,0};

int y[LEN1+LEN2-1];

int main()

{

int i=0,j;

for(i=0;i<(LEN1+LEN2-1);i++)

{

y[i]=0;

for(j=0;j<=i;j++)

y[i]+=x[j]*h[i+j];

}

for(i=0;i<(LEN1+LEN2-1);i++)

printf("%d\n",y[i]);

}

Answer 1

Take pen copy and do dry run put values one by one you will understood better