SquareRoot.c

/**
* Name: Minhas Kamal
* Date: 02-Apr-2013
**/

#include <stdio.h>

float sqrt(int i);

int main()
{
    int x;
    printf("Enter your integer: ");
    scanf("%d", &x);

    printf("%f", sqrt(x));

    return 0;
}

float sqrt(int i)
{
    float x=1.0;
    float y;

    for( ; y-x>0.0001 || x-y>0.0001; ++x)
    {
        y=(x+i/x)/2;
    }

    return y;
}