how do I writing function for this code - c

Question

I'm trying to write a function or method for the code. I'm really lost at how to come with the loop that print out the number born and number died in the output below.
Here is my code:
#include <stdio.h>
char grid[10][10];
// Moved this function here
int occ(int x, int y) {
int i, j, count;
char gridCopy[10][10];
// You probably are going to do this often in the future
// Make a function for it instead of having the same code often
void printGrid() {
int i, j;
for (i = 0; i < 10; i++) {
for (j = 0; j < 10; j++)
printf("%c", grid[i][j]);
printf("\n");
}
}

Answer 1

You don't need gridCopy in occ function.
Please remember that array is transposed. When you access element (x,y) you need to use grid[y][x]
Below is the working code with function generateNext() which generates next state for whole grid array. This is place where you need girdCopy. Results are exactly the same as in your example.
#include <stdio.h>
#include <stdlib.h>
char grid[10][10];
int born,died,generation;
// Moved this function here
int occ(int x, int y) {
int count;
int xm1,xp1,ym1,yp1;
xm1=x-1;xp1=x+1;ym1=y-1;yp1=y+1;
if (xm1<0) // handle boundary cases - wrap around
xm1=9;
if (ym1<0)
ym1=9;
if (xp1>9)
xp1=0;
if (yp1>9)
yp1=0;
// Checking on the value of the neighboring cells
count = 0;
if (grid[ym1][x] == '*')
count++;
if (grid[ym1][xp1] == '*')
count++;
if (grid[y][xp1] == '*')
count++;
if (grid[yp1][xp1] == '*')
count++;
if (grid[yp1][x] == '*')
count++;
if (grid[yp1][xm1] == '*')
count++;
if (grid[y][xm1] == '*')
count++;
if (grid[ym1][xm1] == '*')
count++;
return count;
}
void generateNext()
{
int x,y;
char gridCopy[10][10];
born=0;died=0;
generation++;
for (y=0; y<10; y++) {
for (x=0; x<10; x++) {
gridCopy[y][x]=grid[y][x];
}
}
for (y=0; y<10; y++) {
for (x=0; x<10; x++) {
if (grid[y][x]=='*' && occ(x,y)<2)
{gridCopy[y][x]='-';died++;}
if (grid[y][x]=='*' && occ(x,y)>3)
{gridCopy[y][x]='-';died++;}
if (grid[y][x]=='-' && occ(x,y)==3)
{gridCopy[y][x]='*';born++;}
}
}
for (y=0; y<10; y++) {
for (x=0; x<10; x++) {
grid[y][x]=gridCopy[y][x];
}
}
}
// You probably are going to do this often in the future
// Make a function for it instead of having the same code often
void printGrid() {
int x, y;
for (y = 0; y < 10; y++) {
for (x = 0; x < 10; x++)
printf("%c", grid[y][x]);
printf("\n");
}
}
/*
*
*/
int main(int argc, char** argv) {
int x, y, answ;
// Setting entire grid to '-'
for (y = 0; y < 10; y++)
for (x = 0; x < 10; x++)
grid[y][x] = '-'; // No need for a variable, just use '-' directly
// Printing out grid
printf("This is the original array\n");
printGrid();
// Setting initial state
grid[5][4] = '*'; // No need for a variable, just use '*' directly
grid[5][5] = '*';
grid[5][6] = '*';
grid[4][4] = '*'; grid[3][4] = '*';
grid[4][6] = '*'; grid[3][6] = '*';
// Printing out grid
printf("This is the new array\n");
printGrid();
//printf("The number of neighbors is: %d\n", occ(3, 3));
generation=0;
answ=1;
while(answ)
{
generateNext();
printf("\n\nGeneration number %d",generation);
printf("\nBorn=%d,Died=%d\n",born,died);
printGrid();
printf("\nPrint next generation-1,Exit-0:");
scanf("%d",&answ);
}
return (EXIT_SUCCESS);
}

Answer 2

Counting is similar to what you have to do to print or copy the whole grid: you use the same loop(s), but at each cell, add to the appropriate counter depending on what is in it.
Alternatively, if keep counts of the number of dead and live cells, you can update those as you update the grid: if a cell changes, update the counters appropriately if the cell becomes alive or becomes dead. This can also be used if you need to report how many were born & how many died each turn.