converting program from visual to c++

[ro7_ad]

i want to convert this program to read it in c-free (C++)
plllllllzzzz i need this now !! thanx all

#include<stdio.h>
#include<math.>
using namespace std;

float x[20], y[20];

void get_corners(int n, float x[], float y[]){
    int tempx,tempy;

    for(int i=0; i<n; i++)
        {
            cout<<"Enter (x, y) for point "<<i<<endl;

            cin>>tempx;
            x[i]=tempx;

            cin>>tempy;
            y[i]=tempy;
        }

    if(((x[0]!=x[n-1]))||(y[0]!=y[n-1]))
        exit (EXIT_FAILURE);

}

void output_corners(int n, float x[], float y[]){

    cout<<"     x(m)     y(m)"<<endl;
    cout<<"-------------------------"<<endl;

    for(int i=0; i<n; i++)
    {
        cout<<"     ";
        cout<<x[i]<<"        "<<y[i]<<endl;
    }

    cout<<endl;
    cout<<"-------------------------"<<endl;

}

float polygon_area(int n, float x[], float y[]){
    float a=0;

    for(int i=0; i<=n-2; i++)
    {
        a += (x[i+1]+x[i])*(y[i+1]-y[i]);
    }

    a = abs(0.5*a);
    return a; 
}

float polygon_price(float a){

    if(a>=0 && a<=499.99)
        return a*3000;

    if(a>=500 && a<=1999.99)
        return a*3500;

    if(a>=2000 && a<=3999.99)
        return a*4000;

    if(a>=4000)
        return a*5000;

}

void int(){

    //double x[20]={40,40,70,70,90,70,40};
    //double y[20]={0,75,75,30,0,0,0};
    int n;

    cout<<"Enter number of corner points:"<<endl;
    cin>>n;

    n=n+1;

    if((n<4)||(n>20))
        exit (EXIT_FAILURE);

    float a = 0, price = 0;

    get_corners(n,x,y);
    output_corners(n,x,y);

    a = polygon_area(n,x,y);
    price = polygon_price(a);

    cout<<endl;
    cout.precision(15);
    cout<<"Area = "<<a<<" m2,";

    cout<<"     ";

    cout<<"Price = "<<price<<" Dhs";
    cout<<endl<<endl;
return 0;
}

[NathanOliver]

This is already in c++. What do you want to convert it to? There are a couple errors in this. Line 2 and line 70 are wrong.

[Moschops]

Line 70. That function is meant to be called main, I expect.

Those headers have proper C++ versions. cstdlib and cmath

You'll need to specify that you are using namespace std;

Rip out calls to exit and replace them with return.

[ro7_ad]

i cant explain but i want the program that start with include<stdio.h> and use printf and scanf not the cout and c in !!! and if you can solve the problem i will be more than thankful

[ro7_ad]

i need this project for tomorow and im really sorry for that i may distribute you guys

[NathanOliver]

So you want to go from c++ to c? I dont think someone is going to do that for you though. Do you know how to use printf() and scanf()? It shouldn't take you to long to do it.

[ro7_ad]

yes i know how to use it but the problem is in how do i convert all this data

[deceptikon]

but the problem is in how do i convert all this data

You don't. Pretty much the only C++isms the code uses are in I/O. Replace cin and cout with scanf() and printf() and you're done except for minor syntax errors that are trivial to fix.

[ro7_ad]

soooooooory there is problem is my program above in the firest 3 lines
and i just solve it ^^"

#include "iostream";
#include <cmath>
using namespace std;

float x[20], y[20];

void get_corners(int n, float x[], float y[]){
    int tempx,tempy;

    for(int i=0; i<n; i++)
        {
            cout<<"Enter (x, y) for point "<<i<<endl;

            cin>>tempx;
            x[i]=tempx;

            cin>>tempy;
            y[i]=tempy;
        }

    if(((x[0]!=x[n-1]))||(y[0]!=y[n-1]))
        exit (EXIT_FAILURE);

}

void output_corners(int n, float x[], float y[]){

    cout<<"     x(m)     y(m)"<<endl;
    cout<<"-------------------------"<<endl;

    for(int i=0; i<n; i++)
    {
        cout<<"     ";
        cout<<x[i]<<"        "<<y[i]<<endl;
    }

    cout<<endl;
    cout<<"-------------------------"<<endl;

}

float polygon_area(int n, float x[], float y[]){
    float a=0;

    for(int i=0; i<=n-2; i++)
    {
        a += (x[i+1]+x[i])*(y[i+1]-y[i]);
    }

    a = abs(0.5*a);
    return a; 
}

float polygon_price(float a){

    if(a>=0 && a<=499.99)
        return a*3000;

    if(a>=500 && a<=1999.99)
        return a*3500;

    if(a>=2000 && a<=3999.99)
        return a*4000;

    if(a>=4000)
        return a*5000;

}

void main(){

    //double x[20]={40,40,70,70,90,70,40};
    //double y[20]={0,75,75,30,0,0,0};
    int n;

    cout<<"Enter number of corner points:"<<endl;
    cin>>n;

    n=n+1;

    if((n<4)||(n>20))
        exit (EXIT_FAILURE);

    float a = 0, price = 0;

    get_corners(n,x,y);
    output_corners(n,x,y);

    a = polygon_area(n,x,y);
    price = polygon_price(a);

    cout<<endl;
    cout.precision(15);
    cout<<"Area = "<<a<<" m2,";

    cout<<"     ";

    cout<<"Price = "<<price<<" Dhs";
    cout<<endl<<endl;

}

[ro7_ad]

plz i need some to help me outfrom this pllz ^_^"

just convert it

[deceptikon]

just convert it

I'm not going to do your work for you if I'm not getting the grade for it. If you want help with a specific error or problem, give us details about what the error is, what you expect, and what you get that differs from your expectation.

[NathanOliver]

If you wont do your homework why should I? If it is do tomorrow then you should have plenty of time to rewrite 100 lines of code.