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Convert a string to uppercase
#include <string.h>
char* strupr( char* s1 );
- s1
- The string that you want to convert to uppercase.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The strupr() function replaces
the string s1 with uppercase characters, by invoking
toupper()
for each character in the string.
The address of the string.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char source[] = { "A mixed-case STRING" };
int main( void )
{
printf( "%s\n", source );
printf( "%s\n", strupr( source ) );
printf( "%s\n", source );
return EXIT_SUCCESS;
}
produces the output:
A mixed-case STRING
A MIXED-CASE STRING
A MIXED-CASE STRING
Unix
Safety: | |
Cancellation point |
No |
Interrupt handler |
Yes |
Signal handler |
Yes |
Thread |
Yes |
strlwr(),
toupper()
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