card game - what to put between the square brackets [ ]?

问题

Im trying to do a card game (user vs pc) where the first to get 7.5 points win. For that I created a deck that have 4 suits with 10 cards each one. The cards go from 1 to 10, and the value of the cards 1-7 they value the number they have. Cards 8,9 and 10 value 0.5 points.

I created an array to store the cards and another to mark a card as deleted when chosen

int deck[40] = {1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,10,10,10,10};
int draw[40] = {0}; //array to "delete" a card. Mark a card as "deleted", e.g., by setting it to 1,
                    // then if the card chosen has been deleted, it choose again.

The thing is that I dont know what to put between the square brackets in draw[ ] = 1 for it to work

See my code:

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

int main()
{
  srand( time(NULL) );
  int key, card, cardpc;
  int deck[40]={1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,10,10,10,10};
  int draw[40] = {0}; //array to "delete" a card. Mark a card as "deleted", e.g., by setting it to 1,
                   // then if the card chosen has been deleted, it choose again.
  float points, points_pc;

  printf("Press 1 to play or 0 to not!\t");
  scanf("%d", &key);

  printf("\n");

  if (key ==0){
  printf("BYE\n");

  }else if (key==1){
   while(key==1){
     card = deck[rand()% 40];
     if (draw[] == 1){
     card = deck[rand()% 40];
     }
     if(card==8 || card==9 || card==10){
        printf("You got 0.5 points");
        points = points + 0.5;
     }else{
        printf("You got %d points",card);
        points = points + card;
     }
     printf("\n");
     printf("Your score is: %0.1f \n", points);
   
     draw[]=1

     cardpc = deck[rand()% 40];
     if (draw[] == 1){
       card = deck[rand()% 40];
     }
     if(cardpc==8 || cardpc==9 || cardpc==10){
         printf("The PC got 0.5 points");
         points_pc = points_pc + 0.5;
     }else{
         printf("The PC got %d points", cardpc);
         points_pc = points_pc + cardpc;
     }
     printf("\n");
     printf("The PC score is: %0.1f \n", points_pc);
   
     draw[]=1;

     printf("Do you want another card? (Press 1 if you want it)\t");
     scanf("%d", &key);

     printf("\n");
   }
}

回答1:

You need a separate variable:

int n = rand()% 40;
card = deck[n];
if (draw[n] == 1){

来源：https://stackoverflow.com/questions/65135863/card-game-what-to-put-between-the-square-brackets