// add.cpp
#include <iostream>
#include<cstdlib>  // for cls, exit and atof functions
#include<cctype>  // for lisspace()
#include "../include/clear.hpp"
using namespace std;
//#include<cmath>

float add(float, float);  // prototype method for add funtion
// void DosCls();  // from external file
void badinput();  // function prototype for function to clear cin

int main(int argc, char* argv[]) //get arguments
{
DosCls();  //external function to clear screen

float x = 0.0, z = 0.0;
cout << "Enter a number followed by [enter] to add, then 0 to quit!" <<endl;
if (argc>=2) {
cout <<"starting program: " <<argv[0] <<endl;
cout <<"with initial values: - ";
} /* endif */
//cout.setf(ios::fixed);
//cout.setf(ios::showpoint);
cout.precision(2);
cout.setf(ios::fixed,ios::floatfield); // fixed-point
for(int count = 1; count < argc; count++) {  // for loop to go through array of input values
                                                     // start with number 1  0= program name
float f= atof(argv[count]);  // convert point from char to float
cout <<f <<" - ";  // show initial values
z=add(f,z);  // pass value to the add funtion
}  /* endif */
cout <<endl;
do {   //now enter the main do loop
   cout <<"Total is " <<z << " enter another Number to add: "; //display total and ask for another number
   cin >>x;  // get new number
   if(!cin.fail())  {  // if cin ok call the add functionfail
   z=add(x,z);
          } 

else if(cin.fail()){  // clear cin on errors
  cout <<"with your total at " <<z  <<endl;
  badinput();	// clear cin to continue
 // cout << "enter Number to add: ";

     } /* endif */
          }
 while (x != 0);  // finish on 0

      cout <<"Total value of number at program close: " <<z <<endl;
return 0;
}  // end main


float add(float x, float z)
{
x=z+x;  //meaning x=x+z
return x;
}

void badinput(void) // simple but improved function to clear cin
   // this time if cin cannot be cleared the program will close			
{
  cout <<"Cin failed... clearing block please wait..." <<endl;
  if (cin.fail() && !cin.bad()) {
   cin.clear();  // reset cin
     while (!isspace(cin.get())) 
     continue;

}
else{
cout<< "unable to clear block in cin... exiting ";
exit(-1);
}
  } /* endwhile */