Programming in C

122 Chapter 8 Working with Functions

Program 8.2 Output

Programming is fun.

Programming is fun.

Execution of the preceding program starts at main, which contains two calls to the

printMessagefunction.When the first call to the function is executed, control is sent

directly to the printMessagefunction, which displays the message “Programming is

fun.” at the terminal and then returns to the mainroutine. Upon return, another call to

the printMessageroutine is encountered, which results in the execution of the same

function a second time. After the return is made from the printMessagefunction, exe-

cution is terminated.

As a final example of the printMessagefunction, try to predict the output from

Program 8.3

Program 8.3 More on Calling Functions

#include <stdio.h>

void printMessage (void)

{

printf ("Programming is fun.\n");

}

int main (void)

{

int i;

for ( i = 1; i <= 5; ++i )

printMessage ();

return 0;

}

Program 8.3 Output

Programming is fun.

Programming is fun.

Programming is fun.

Programming is fun.

Programming is fun.

Arguments and Local Variables

When the printffunction is called, you always supply one or more values to the func-

tion, the first value being the format string and the remaining values being the specific