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  1. #include <ctype.h>
  2.  
  3. int blackJackValue(char card1, char card2) {
  4.     // Convert both to uppercase in case user types lowercase
  5.     card1 = toupper(card1);
  6.     card2 = toupper(card2);
  7.  
  8.     int value1 = 0, value2 = 0;
  9.  
  10.     // ---------- Determine value for card1 ----------
  11.     if (card1 >= '2' && card1 <= '9') {
  12.         value1 = card1 - '0';
  13.     }
  14.     else if (card1 == 'T' || card1 == 'J' || card1 == 'Q' || card1 == 'K') {
  15.         value1 = 10;
  16.     }
  17.     else if (card1 == 'A') {
  18.         value1 = 11;
  19.     }
  20.     else {
  21.         return -1;   // invalid card
  22.     }
  23.  
  24.     // ---------- Determine value for card2 ----------
  25.     if (card2 >= '2' && card2 <= '9') {
  26.         value2 = card2 - '0';
  27.     }
  28.     else if (card2 == 'T' || card2 == 'J' || card2 == 'Q' || card2 == 'K') {
  29.         value2 = 10;
  30.     }
  31.     else if (card2 == 'A') {
  32.         value2 = 11;
  33.     }
  34.     else {
  35.         return -1;   // invalid card
  36.     }
  37.  
  38.     // ---------- Special Ace handling ----------
  39.     if (card1 == 'A' && card2 == 'A') {
  40.         // One ace stays 11, the other becomes 1
  41.         return 12;
  42.     }
  43.  
  44.     // Otherwise normal sum
  45.     return value1 + value2;
  46. }
  47.  
Compilation error #stdin compilation error #stdout 0.01s 5304KB
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stdin
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Standard input is empty
compilation info 
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/8/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/k8xozB
language:
C (gcc 8.3)
created:
91 days ago
visibility:
public

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