Program to find out the data type of user input

Take a input from user and find out the data type of input value.

Examples :

Input : geek
Output : The input is a string

Input : chetna
Output : The input is a string

Input : 4
Output : The input is a integer

Below is C program to find the datatype of user input :

// C program to find data type
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
# define MAX_INPUT 100

int main()
{
    // To read input
    char value[MAX_INPUT] = "";

    // To store numeric value of input if a
    // number (float or integer)
    double temp;

    // To store integral value of input
    int n;

    // To store string value of input
    char str[MAX_INPUT] = "";

    // Precision for integer checking
    double val = 1e-12;

    fgets(value, 100, stdin); // Read input

    // Check for integers.
    if (sscanf(value, "%lf", &temp) == 1)
    {
        n = (int)temp; // typecast to int.
        if (fabs(temp - n) / temp > val)
            printf("The input is a floating point\n");
        else
            printf("The input is an integer\n");
    }

    // Check for string
    else if (sscanf(value, "%s", str) == 1)
        printf("The input is a string\n");

    else // No match.
        printf("input not recognized\n");
}

Output :

4
The input is an integer