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16-Bit Language Tools Libraries
tolower (Continued)
Output:
B changes to lower case b
b remains lower case b
@ has no lower case, so @ is returned
toupper
Description:
Include:
Prototype:
Convert a character to an upper case alphabetical character.
<ctype.h>
int toupper (int c );
Argument:
c
The character to convert to upper case.
DS51456E-page 22
Return Value:
Remarks:
Example:
Returns the corresponding upper case alphabetical character if the
argument was originally lower case; otherwise, returns the original
character.
Only lower case alphabetical characters may be converted to upper
case.
#include <ctype.h> /* for toupper */
#include <stdio.h> /* for printf */
int main(void)
{
int ch;
ch = 'b';
printf("b changes to upper case %c\n",
toupper(ch));
ch = 'B';
printf("B remains upper case %c\n",
toupper(ch));
ch = '@';
printf("@ has no upper case, ");
printf("so %c is returned\n", toupper(ch));
}
Output:
b changes to upper case B
B remains upper case B
@ has no upper case, so @ is returned
? 2008 Microchip Technology Inc.
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