Define function and return value

  
#include <stdio.h>

int f(void);  

int main(void)
{
  char ch;

  ch = f();
  printf("%c", ch);

  return 0;
}

int f(void)
{
  return 'a';
}

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2.	Definition of the function to calculate an average
3.	Demonstraction of function call
4.	Function call
5.	Check out the int value change before and after function call
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7.	Uses a function prototype to enforce strong type checking
8.	Serve as a prototype within this program
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11.	A program with two functions
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14.	Return statement
15.	Assign function return value to a variable
16.	A simple program that demonstrates sum()
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18.	Function to output square
19.	Define two functions and call them in main
20.	Function which returns int value
21.	Define function with void return
22.	Define function to calculate the ounces and cups
23.	Function declaration
24.	Define function to calculate the volumn
25.	Function prototype: declare getnum() prior to its first use
26.	Define function with parameter and return value
27.	Function call each other
28.	Define two functions and make function call
29.	Global and local variable inside function
30.	Function prototype

Define function and return value : Function « Function « C / ANSI-C