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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. char *uppercase(char source[])
  6. {
  7.      int i;
  8.      size_t len = strlen(source);
  9.      char *tmp;
  10.      tmp = malloc(len+1);
  11.      memcpy(tmp, source, len+1);
  12.  
  13.      for(i=0; i<len; ++i){
  14.         if (tmp[i]>= 'a' && tmp[i]<= 'z'){
  15.             tmp[i]= tmp[i]-'a' +'A';
  16.         }
  17.     }
  18.  
  19.     return tmp;
  20. }
  21.  
  22. int main(){
  23.     char *str = uppercase("cold");
  24.     printf("%s", str);
  25.     free(str);
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0s 2424KB
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stdin
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Standard input is empty
stdout
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COLD
https://ideone.com/BJHDIF
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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