#include <stdio.h>
#include <stdlib.h>
#include<string.h>
int main(int argc, char *argv[])
{
int i,j,c,r,r1,row,row1;
int st[9],st1[9],st2[9];
FILE *f = fopen(argv[1], "r");
FILE *f1=fopen(argv[2],"r");
r=9;
r1=9;
/*initialize array*/
for(i=0;i<r;i++)
{
st[i]='\0';
}...