Exploring Data Types

/*Exploring Data Types (100 Marks)
For this challenge, you need to read a line from stdin and check whether it is of type integer, float or string.
If input is-
    Integer print 'This input is of type Integer.' to the stdout
    Float print 'This input is of type Float.' to the stdout
    String print 'This input is of type string.' to the stdout
    else print 'This is something else.' to the stdout*/
    #include <stdio.h>
#include <stdlib.h>
int main() {
   char input[50] = "";
   float temp;
   int intVal;
   char stringVal[50] = "";
   float val = 1e-12;
   fgets(input, 100, stdin);
   if (sscanf(input, "%lf", &temp) == 1) {
      intVal = (int)temp;
      if (fabs(temp - intVal) / temp > val)
         printf("This input is of type Float.\n");
      else
         printf("This input is of type Integer.\n");
   }
   else if (sscanf(input, "%s", stringVal) == 1)
      printf("This input is of type string.\n");
   else
      printf("This is something else.\n");
}