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Program Discussion :: Basics
Home > Programs > Basics

318. Write a program in C using command line argument to input one number and print the square root of the number without using sqrt().

Answer:

#include <stdio.h>
#include <stdlib.h>

int SqrtOfNumber (int);

int main(int argc, char * argv[])
{
    int  temp = 0;
    if(argc == 1 ||  argc > 2)
    {
         printf("Enter the number \n");
         exit(1);
    }
    temp = atoi (argv[1]) ;
    printf("Sqrt of the num. %d = %d\n", temp, SqrtOfNumber(temp));
}

int SqrtOfNumber (int num)
{
    int i = 1, result = 1;

    if (num == 0 || num == 1)
       return num;

    while (result < num)
    {
       if (result == num)
          return result;
       i++;
       result = i*i;
    }
    return i-1;
}

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