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  1. #include <stdio.h>
  2.  
  3. char upperCase (char c)
  4. {
  5.     if (c >= 'a' && c <= 'z') {
  6.         c = c - 'a' + 'A';
  7.     }
  8.     return c;
  9. }
  10.  
  11. int main (void) 
  12. {
  13.     char c;
  14.     printf("input:");
  15.     scanf("%c", &c);      
  16.     c = upperCase(c);   
  17.     printf("output:%c", c);
  18.  
  19.     return 0;
  20. }
Success #stdin #stdout 0.01s 1724KB
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stdin
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Standard input is empty
stdout
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input:output:
https://ideone.com/19VfdS
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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