example of source file
Example Source File in C with Explanations
Here is an example of a source file written in the C programming language, along with explanations for each step:
#include <stdio.h>
int main() {
int num1, num2, sum;
printf("Enter two numbers: ");
scanf("%d %d", &num1, &num2);
sum = num1 + num2;
printf("The sum is: %d\n", sum);
return 0;
}
Explanation:
- The code begins with the
#include <stdio.h>
directive, which includes the standard input/output library in the program. This library provides functions likeprintf
andscanf
for input and output operations. - The
main
function is the entry point of the program. It has a return type ofint
and takes no arguments. - Inside the
main
function, three variables are declared:num1
,num2
, andsum
. These variables are of typeint
and will be used to store user input and the sum of the two numbers. - The
printf
function is used to display a prompt message asking the user to enter two numbers. - The
scanf
function is used to read two integers from the user and store them in the variablesnum1
andnum2
. - The
sum
variable is assigned the sum ofnum1
andnum2
using the+
operator. - The
printf
function is used again to display the sum to the user. - Finally, the
return 0
statement indicates the successful execution of the program.
This example demonstrates a simple C program that takes two numbers as input from the user, calculates their sum, and displays the result.