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  1. #include <stdio.h>
  2. #include <stdbool.h>
  3.  
  4. int blackJackValue(char card1, char card2);
  5.  
  6. int main(void) {
  7. 	char c1, c2;
  8.     printf("Enter cards: ");
  9.     if (scanf(" %c %c", &c1, &c2) != 2) {
  10.         printf("*** Invalid input format\n");
  11.         return 1;
  12.     }
  13.  
  14.     blackJackValue(c1, c2);
  15.  
  16. 	return 0;
  17. }
  18.  
  19. int blackJackValue(char card1, char card2) {
  20.     int cardTotal = 0;
  21.     bool aceFlag = false;
  22.     char cards[2] = { card1, card2 };
  23.  
  24.     for (int i = 0; i < 2; i++) {
  25.         char c = cards[i];
  26.  
  27.         if (c >= '2' && c <= '9') {
  28.             cardTotal += c - '0';
  29.         }
  30.         else if (c == 'T' || c == 'J' || c == 'Q' || c == 'K') {
  31.             cardTotal += 10;
  32.         }
  33.         else if (c == 'A') {
  34.             if (!aceFlag) {
  35.                 cardTotal += 11;
  36.                 aceFlag = true;
  37.             } else {
  38.                 cardTotal += 1;
  39.             }
  40.         }
  41.         else {
  42.         	printf("\nERROR, %c is not a valid card", c);
  43.             return -1; // invalid card
  44.         }
  45.     }
  46.     printf("\nThe score is %d\n", cardTotal);
  47.     return cardTotal;
  48. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
0 Q
stdout 
Enter cards: 
ERROR, 0 is not a valid card
https://ideone.com/2yLhrD
language:
C (gcc 8.3)
created:
25 days ago
visibility:
public

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