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  1. # include <stdio.h>
  2.  
  3. void myToUpper(char s[]){
  4.     char *p = s;
  5.  
  6.     while(*p != '\0'){
  7.         if(*p >= 'a' && *p <= 'z'){
  8.             *p = *p - ('a' - 'A');
  9.         }
  10.         p++;
  11.     }
  12. }
  13.  
  14. int main(){
  15.     char s[100];
  16.     scanf("%s", s);
  17.  
  18.     printf("%s -> ", s);
  19.     myToUpper(s);
  20.     printf("%s\n", s);
  21.  
  22.     return 0;
  23. }
  24.  
  25.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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aBcDe
stdout
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aBcDe -> ABCDE
https://ideone.com/OHpJpR
language:
C (gcc 8.3)
created:
6 hours ago
visibility:
public

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