#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <conio.h>

#define CELLS 10

#define COLS 50

int main(void) {

srand(time(NULL)); /* for "visible" random */

int array[COLS][CELLS];

int i;

int j;

for (i = 0; i < COLS; i++) {

 for (j = 0; j < CELLS; j++) {

  array[i][j] = 1 + rand() % 10 - 1; /* random 1 through 9 */

  printf("%d ", array[i][j]);

 }

 printf("\n");

}

getch();

printf("\n");

int valid = 0;

for (i = 0; i < COLS; i++) {

 int max = 0;  

 printf("sum of [");

 for (j = 0; j < CELLS; j++) {

  if (j < (CELLS - 1)) {

   printf("%d ", array[i][j]);

  } else {

   printf("%d] = ", array[i][j]);

  }

  max += array[i][j];

 }

 printf("%d ", max);

 if (max % 7 == 0) {

  valid++;

  printf("[%d / 7 = %d]\n", max, max / 7);

 } else {

  printf("\n");

 }

}

printf("\namount: %d\n", valid);

getch();

return 0;

}