text: #include <stdio.h>
  #include "PostCalculator.h"
  
  int main(int argc, char const *argv[])
  {
      char postExp1[] = "42*8+";
      char postExp2[] = "123+*4/";
  
      printf("%s = %d \n", postExp1, EvalRPNExp(postExp1));
      printf("%s = %d \n", postExp2, EvalRPNExp(postExp2));
      return 0;
  }
  