Demonstrating call to a function

• 1: #include <iostream.h>
 
• 2: // function Demonstration Function
 
• 3: // prints out a useful message
 
• 4: void DemonstrationFunction()
 
• 5: { cout << "In Demonstration Function\n"; }
 
• 6: // function main - prints outa message, then
 
• 7: // calls DemonstrationFunction, then prints
 
• 8: //out a second message.
 
• 9: int main() { cout << "In main\n" ;
 
• 10: DemonstrationFunction();
 
• 11: cout << "Back in main\n";
 
• 12: return 0; } 

Output for Function call : 

• In main
 
• In Demonstration Function
 
• Back in main