C Simple Programs

Simple C Program to Calculate Sum of Digits of a Number

noreply@blogger.com (Anonymous) — Wed, 03 Jul 2013 18:49:00 +0000

This is a very simple C Language program that calculates the sum of digits of a 5 digit number. The 5 digit number is entered by the user. Here's the code and output of the program. Enjoy!!!

Code

#include <stdio.h>
int main()
{
    int num, d1, d2, d3, d4, d5,sum;
    printf("Enter a five digit number:");
    scanf("%d",&num);
    d1 = num / 10000;
    d2 = (num % 10000) / 1000;
    d3 = (num % 1000) / 100;
    d4 = (num % 100) / 10;
    d5 = num % 10;
    sum = d1 + d2 + d3 + d4 + d5;
    printf("sum: %d", sum);
    return 0;
}

Output

You can go through the code and in case of any confusion, you can feel free to ask me by using the comment form below.

Simple C Program to check if number is Even or Odd

noreply@blogger.com (Anonymous) — Thu, 27 Jun 2013 08:25:00 +0000

This is a simple C programs which checks if a given number is even or odd. An even number is one that is completely divisible by 2 and an odd number is one which is not.

C Program: Check if given number is Even or Odd

#include <stdio.h>
int main()
{
    int number;/*Variable Declaration*/
    printf ("Enter any number: ");
    scanf ("%d", &number);/*Number input by the user*/
    
    if (number % 2 == 0)/*Checks if number is divisible by 2*/
    printf ("Number is Even");
    else
    printf ("Number is Odd");
    return 0;
}

Output

This program uses a single variable 'number' which stores the integer that is input by the user. The main task is done by the if statement:

    if (number % 2 == 0)/*Checks if number is divisible by 2*/
    printf ("Number is Even");
    else
    printf ("Number is Odd");

The if statement uses modular division. The modular division works slight differently than ordinary division in this way that it gives the remainder. So:

16 % 3 = 1

Therefore, if a number is completely divisible by any number then modular division will give 0.

Go through the code and in case of any confusion feel free to ask me by using the contact form below.

Simple C Language Program to Print Shapes

noreply@blogger.com (Anonymous) — Sun, 23 Jun 2013 07:45:00 +0000

Printing shapes is a common task given to C Language students. It is a good way to capture the main concepts of looping. We'll discuss different methods to print shapes in C Language using looping. If you get these simple concepts well, then the rest becomes a smooth ride.
So, let's start with the show.

C Program: Print a Square

#include <stdio.h>
int main()
{
    int n, a, b;
    n = 6;
    for(a=1;a<=n;a++)
    {
                     for(b=1;b<=n;b++)
                     printf("*");
    printf("\n");}
    return 0;
}

Output

This is very a simple example. The program prints a square with a fixed height and length. It uses three variables n, a and b. 'n' specifies the length and height of the square (in number of stars) while a and b are loop counters. The program utilizes the concept of nested For Loops. The main For Loop starts on line 6 and ends on 10.

    for(a=1;a<=n;a++)
    {
                     for(b=1;b<=n;b++)
                     printf("*");
    printf("\n");}

In line 6, the first For Loop initializes loop counter 'a' to a value of 1. The condition (a <= n) makes sure that the loop is executed 'n' number of times. The second For Loop starts at line 8 with the initialization of loop counter 'b' to a value of 1. This loop also executes 'n' number of times and each time prints an asterisk(*). Thus, printing a whole row. So, each time the first loop executes, the second loop executes 'n' number of times and prints an asterisk. The control then returns to the first loop which prints a new line character '\n'. In this way, a square gets printed.

C Program: Print a Right Triangle

This another simple C program that prints a right triangle, a triangle that contains a right angle. So, here's the code.

Code

#include <stdio.h>
int main()
{
    int a=12, b, c;
    
    for(b=1 ; b<=a ; b++)
    {
               for(c=1;c<=b;c++)
               printf("*");
               
    printf("\n");
}
return 0;
}

Output

This program works in quite similar fashion as the last one. It also contains nested For Loops. The inner For Loop prints the asterisks while the the outer one prints a newline character (\n) after each row. You can notice that the first row contains one asterisk, the second row two and the third row has three stars. In this way a triangle gets printed.

You can go through the code and in case of any confusion, you can feel free to ask me by using the contact form below.

C Program to Find Factorial of a Number

noreply@blogger.com (Anonymous) — Fri, 21 Jun 2013 07:18:00 +0000

This is a simple C language program to find factorial of any number. In case you don't know what factorial is, factorial is the product of an integer and all the integers below it. For example:

5! = 1 * 2 * 3 * 4 * 5 = 120

The program first prompts for any integer. Then, finds the factorial using For Loop and prints the result.

Code

#include <stdio.h>
int main()
{int n, i, fac=1;
    printf("Enter any number: ");
    scanf("%d",&n);   
    for(i=1;i<=n;i++)
    fac = fac * i;    
    printf("Factorial: %d", fac);
    return 0;
}

Output

#include <stdio.h>

This is a preprocessor directive.
Program execution starts with main()

int main()

We initialize three integer variables, namely 'n', 'i' and 'fac', and give an initial value of 1 to fac. The variable n holds the number that is input by the user. The variable 'i' acts as the loop counter.

    for(i=1;i<=n;i++)
    fac = fac * i;

Thus, the for loop initializes 'i' to 1, then checks if 'i' is less than or equal to 'n'. If condition is true, then the statement gets executed and 'i' is incremented by 1. Thus, the loop carries out the statement 'n' number of times.