Add as much detail as you can [closed]

So I have been looking at a C program code for the below coding, need to get output but unable to get it

#include <stdio.h>
#include <stdlib.h>

void instructions(){
    
    system("cls");
    printf("Instructions");
    printf("\n----------------");
    printf("\n Avoid Cars by moving left or right. ");
    printf("\n\n Press 'a' to move left");
    printf("\n Press 'd' to move right");
    printf("\n Press 'Esc' to exit");
    printf("\n\n Press any key to go back to menu");
    getch();
}


int main()
{
    
    
        system("cls");
        printf("--------------------------\n");
        printf("         Car game         \n");
        printf("--------------------------\n");
        printf("1. Start game\n");
        printf("2. Instructions\n");
        printf("3. Quit\n");
        printf("Select Option: \n");
        scanf("%d");
        char op = getche();
        
        if( op=='1') //play();
        else if ( op=='2' instructions();
        else if( op=='3') //exit(0);
        
   while(1);
   
   return 0;
}