C Exercises: A simple structure of function

Last update on March 20 2025 12:33:55 (UTC/GMT +8 hours)

1. Simple Function Structure Variants

Write a program in C to show the simple structure of a function.

Pictorial Presentation:

C Exercises: A simple structure of function

Sample Solution:

C Code:

#include <stdio.h>

    int sum (int, int);//function declaration
    int main (void)
    {
        int total;
		printf("\n\n Function : a simple structure of function :\n");
		printf("------------------------------------------------\n");	
        total = sum (5, 6);//function call
        printf ("The total is :  %d\n", total);
        return 0;
    }
    
    int sum (int a, int b) //function definition
    {
	    int s;
		s=a+b;
        return s; //function returning a value
    }

Sample Output:

 Function : a simple structure of function :
------------------------------------------------
The total is :  11

Explanation:

int sum(int a, int b) //function definition
{
  int s;
  s = a + b;
  return s; //function returning a value
}

The above function ‘sum’ takes two integer arguments, a and b. It computes the sum of a and b and stores the result in a local integer variable s. Finally, it returns the value of s.

Time complexity and space complexity:

The time complexity of the function 'sum' is O(1), as the computation it performs is constant and independent of the input size.

The space complexity of the function 'sum' is also O(1), as it only uses a fixed amount of memory to store the integer variable 's'.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program that declares a function with no arguments and no return value to print a custom greeting.
Write a C program to demonstrate the separation of function declaration, definition, and invocation using a simple printer function.
Write a C program that calls a function from main which in turn calls another function, showcasing a multi-level call hierarchy.
Write a C program to illustrate function prototypes by defining a function that prints a message and calling it before its definition.

C Programming Code Editor:

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