Connecting Random number in 2d array [closed] - c

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I have generated random number into a 2d array.What I want now is to connect the same number by moving it inside the game board.The problems is it doesn't move.
I really need help!!! I am new to c programming btw. Thanks in advance.
Here's my code:
void playgame(char box[ROW][COL])
{
int x, y, choice2,num,direction=0;
char input;
do{
printf("Please select a number (1-7) : \n");
scanf("%i",&num);
if(x==0 || x==ROW-1 ||y==0 || y==COL-1)
{
printf("Invalid!\n");
}
else
{
printf("Numer %i is currently selected!\n", num);
}
}while(x==0 || x==ROW-1 ||y==0 || y==COL-1);
printf("[1]Move\n[2]Sign out\n");
printf("Enter choice: ");
scanf("%d", &choice2);
switch(choice2)
{
case 1:
{
printf("Press 'E' to go up\n");
/*codes for moving the character up.....*/
}
{
printf("Press 'D' to go right\n");
/*codes for moving the character down.....*/
}
{
printf("Press 'S' to go left\n");
/*codes for moving the character left.....*/
}
{
printf("Press 'X' to go down\n");
/*codes for moving the character up.....*/
}
{
printf("Press 'R' to remove the existing path\n");
}
fflush(stdin);
scanf("%c", &input);
break;
case 2: printf("Bye!\n");
}
for(x=0; x<9; x++)
for(y=0; y<9; y++)
{
if(input == 'E')
if(box[x][y]==num)
{
box[--x][y]==num;
}
if(input == 'D')
if(box[x][y]==num)
{
box[x][y++]==num;
}
if(input == 'S')
if(box[x][y]== num)
{
box[x][--y]== num;
}
if(input == 'X')
if(box[x][y]==num)
{
box[--x][y]==num;
}
}
}

Answer 1

try this:
#include <stdio.h>
#include <stdlib.h>
#define ROW 9
#define COL 9
void display(char box[ROW][COL]);
int validMove(int r, int c, char box[ROW][COL]);
void playgame(char box[ROW][COL]){
int r, c, num;
int choice, nr, nc;
char input, n;
for(;;){
printf("Please select a number (1-7) : \n");
if(1 == scanf("%i", &num) && 1<= num && num <= 7)
break;
printf("Invalid!\n");
while(getchar() != '\n');
}
printf("Numer %i is currently selected!\n", num);
n = num + '0';
for(r = 1; r < ROW-1; ++r)
for(c = 1; c < COL-1; ++c)
if(box[r][c] == n)
goto find;
find:
for(;;){
printf("[1]Move\n"
"[2]Sign out\n"
"Enter choice: ");
scanf("%d", &choice);
switch(choice){
case 1:
printf("Press 'E' to go up\n"
"Press 'D' to go right\n"
"Press 'S' to go left\n"
"Press 'X' to go down\n"
"Press 'R' to remove the existing path\n");
scanf(" %c", &input);
nr = r;
nc = c;
switch(input){
case 'E':
nr = r - 1;
break;
case 'D':
nc = c + 1;
break;
case 'S':
nc = c - 1;
break;
case 'X':
nr = r + 1;
break;
case 'R':
break;
default:
break;
}
if(validMove(nr, nc, box)){
box[nr][nc] = box[r][c];
box[r][c] = ' ';
r = nr;
c = nc;
display(box);
} else if(input != 'R'){
printf("invalid move!\n");
}
break;
case 2: printf("Bye!\n");
exit(0);
}
}
}
int validMove(int r, int c, char box[ROW][COL]){
if(r == 0 || r == ROW-1 || c == 0 || c == COL-1)
return 0;
if(box[r][c] != ' ')
return 0;
return 1;
}
void initBoard(char box[ROW][COL]){
int r, c;
for(r = 0; r < ROW; ++r){
for(c = 0; c < COL; ++c){
if(r == 0 || r == ROW-1 || c == 0 || c == COL-1)
box[r][c] = '#';
else
box[r][c] = ' ';
}
}
for(int i = 1; i <= 7; ++i){
int r = rand() % (ROW-1-1) + 1;
int c = rand() % (COL-1-1) + 1;
if(box[r][c] == ' ')
box[r][c] = i + '0';
else
--i;
}
}
void display(char box[ROW][COL]){
for(int r = 0; r < ROW; ++r){
for(int c = 0; c < COL; ++c){
putchar(box[r][c]);
}
putchar('\n');
}
}
int main(void){
char board[ROW][COL];
initBoard(board);
display(board);
playgame(board);
return 0;
}