Syntax

#include <string.h>
char *strupr(char *string);

strupr converts any lowercase letters in string to uppercase. Other characters are not affected.

strupr returns a pointer to the converted string. There is no error return.

This example makes a copy in all uppercase of the string "DosWrite", and then prints the copy.

#include <string.h>
#include <stdio.h>

int main(void)
{
   char *string = "DosWrite";
   char *copy;

   copy = strupr(strdup(string));
   printf("This is a copy of the string\n");
   printf("with all letters capitalized: %s\n", copy);
   return 0;

   /****************************************************************************
      The output should be:

      This is a copy of the string
      with all letters capitalized: DOSWRITE
   ****************************************************************************/
}

• strlwr
  
• toascii - _tolower - _toupper
  
• tolower - toupper
  
• towlower - towupper

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