#include "intvalidation.h"

int intvalidation(const char * iint)
{
    int i = 0, count = 0, len;
    //unsigned long long int num = 0;

    char * strnum = 0, chnum = 0;

    strnum = (char *) malloc(sizeof (20));

    //sprintf(strnum, "%d", iint);

    len = strlen(iint);

    printf(" len = %d ", len);

    for( count = 0; count < len; count++)
    {
        chnum = (*(iint + count )) ;

        i = chnum - 48;
        if( i >=  0 && i <= 9 )
            continue;
        else
        {
           // printf("\n number is not valid \n");
            return 0;
        }
    }

    return 1;
}

#ifndef INTVALIDATION_H
#define INTVALIDATION_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int intvalidation(const char * iint);

#endif

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

int intvalidation(char *iint);
int AddInt(int i1, int i2);

int main()
{
    unsigned int x, y, sum = 0;
    char *num1, *num2;

    num1 = (char *)malloc(6);

    printf("\n Enter number x = ");
    scanf("%s", num1);

    if(!intvalidation(num1))
    {
        printf("\n number %s is invalid \n", num1);
        exit(1);
    }

    x = atoi(num1);

    num2 = (char*) malloc(6);

    printf( "\n Enter number to add: ");
    scanf("%s", num2);

    if(!intvalidation(num1))
    {
        printf("\n number %s is invalid \n", num2);
        exit(1);
    }

    y = atoi(num2);

    //sum = x + y;
    sum = AddInt(x, y);

    printf("\n %d + %d = %d", x, y, sum);

    return 0;
}