C++ Etymology

The strlwr and strupr functions convert ASCIIZ strings to all upper case or all lower case.  Non-alphabetic characters in the string are not affected. 

These functions are used to convert ASCIIZ strings to all upper case or all lower case. 

string.h

strlwr, strupr

string

std::strlwr, std::strupr

char * strlwr ( char * S );

char * strupr ( char * S );

S

A pointer to the string to be comverred. 

strlwr

A pointer to the argument string after conversion to lower case. 

strupr

A pointer to the argument string after conversion to upper case. 

strlwr

The argument string is converted to lower case. 

strupr

The argument string is converted to upper case. 

• Non-alphabetic characters in the string are not affected. 

/************************************************
 * File:        convert.cpp
 * Description: Short program showihg case 
 *              conversion functions.
 * Date:        11/12/08
 ************************************************/

#include <iostream.h>
#include <string.h>

int main () {
  char Hello [] = "Hello";
  char * Lower;
  
  cout << "The initial string is: " << Hello << "\n";
  strupr (Hello);
  cout << "The upper case string is: " << Hello << "\n";
  Lower = strlwr (Hello);
  cout << "The lower case string is: " << Lower << "\n";
  
  return 0;
}

The initial string is: Hello
The upper case string is: HELLO
The lower case string is: hello