// Demonstrating an array of pointers to functions.
#include <stdio.h>
// prototypes
void function1( int a );
void function2( int b );
void function3( int c );
int main( void )
{
// initialize array of 3 pointers to functions that each take an
// int argument and return void
void (*f[ 3 ])( int ) = { function1, function2, function3 };
size_t choice; // variable to hold user's choice
printf( "%s", "Enter a number between 0 and 2, 3 to end: " );
scanf( "%u", &choice );
// process user's choice
while ( choice >= 0 && choice < 3 ) {
// invoke function at location choice in array f and pass
// choice as an argument
(*f[ choice ])( choice );
printf( "%s", "Enter a number between 0 and 2, 3 to end: " );
scanf( "%u", &choice );
} // end while
puts( "Program execution completed." );
} // end main
void function1( int a )
{
printf( "You entered %d so function1 was called\n\n", a );
} // end function1
void function2( int b )
{
printf( "You entered %d so function2 was called\n\n", b );
} // end function2
void function3( int c )
{
printf( "You entered %d so function3 was called\n\n", c );
} // end function3
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