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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.     char d = 0;
  5.     switch(d) {
  6.     case '0' + '1':
  7.        printf("I am case 'a' + 'b'\n");
  8.        break;
  9.     case '0' + '1':
  10.        printf("I am case 'a' + 'b' \n");
  11.        break;
  12.     }
  13.     return 0;
  14. }
  15.  
Compilation error #stdin compilation error #stdout 0s 9296KB
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stdin
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Standard input is empty
compilation info 
prog.c: In function ‘main’:
prog.c:9:5: error: duplicate case value
     case '0' + '1':
     ^~~~
prog.c:6:5: error: previously used here
     case '0' + '1':
     ^~~~
stdout
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Standard output is empty
https://ideone.com/pyo0lt
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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