c program to find lcm and hcf of two numbers(if,while)

For beginners
{I am going write the c program but before you need a c compiler(software).there are a lot of compilers(software). like  Code::Blocks, dev c++  Download dev c++ its free and install it in your computer.open  dev c++ go to file-->new-->source file.} 


#include<stdio.h>
#include<conio.h>
main()
{
      int a,b,x,y,t,r,lcm;
      printf("enter first number\n");
      scanf("%d",&a);
      printf("enter second number\n");
      scanf("%d",&b);
      x=a;
      y=b;
      if(a<b)
      {
             t=a;
             a=b;
             b=t;
             }
             r=a%b;
             while(r!=0)
             {
                        a=b;
                        b=r;
                        r=a%b;
                        }
                        printf("\n %d is hcf",b);
                        lcm=(x*y)/b;
                        printf("\n %d is lcm",lcm);
                        getch();
                        }

For beginners

{After typing this program go to execute-->compile & run-->a window will pop-up-->give file name:(anything u like)-->save as type: c source files-->click save.}

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