Find The GCD Of Any Two Numbers

This blog is basically for students. In this blog, you will learn how to find the GCD in C programming. The blog give you an idea about the GCD (Greatest Common Divisor).

GCD

GCD stands for Greatest Common Divisor. This is a basic operation for students. I am going to show you how it's calculated by using a flow chart. This solution is based on Euclid's GCD.

 

SYSTEM REQUIRMENT

1.  Windows operating system
2. GCC compiler

FLOWCHART

This flow chart shows you the logic of the code.

 

CODE  IN C-PROGRAMING

// finding gcd of any two Number
#include <stdio.h>                    // including INPUT AND  OUTPUT HEADER FILE

int main()
{
    int f_Num,s_Num,gcd,tempVar;

    printf("Enter first Number :");
    scanf("%d",&f_Num);             // takeing first number from user

    printf("Enter Second Number :");
    scanf("%d",&s_Num);             // takeing scond number from user

    if(f_Num < s_Num)                // echanging the number if fisrt number is greater than second number
    {
        tempVar = f_Num;
        f_Num = s_Num;
        f_Num = tempVar;
    }

    printf("GCD(%d,%d) :",f_Num,s_Num );

    while(!(s_Num == 0))            // logic of solveing  gcd
    {
        gcd = f_Num % s_Num;
        f_Num = s_Num;
        s_Num = gcd;
    }

    printf("%d",f_Num);             // printing of gcd

    return 0;
}

OUTPUT