I need to make this code modular. Apparently I've done this wrong, so any way I could get advice would be appreciated. #include float getSpeed(double speedLimit, double speed); int totalSpeed();...

I need to make this code modular. Apparently I've done this wrong, so any way I could get advice would be appreciated.

#include

float getSpeed(double speedLimit, double speed);
int totalSpeed();

using namespace std;

const int LOWSPEED = 20;
const int HIGHSPEED = 70;

int main()
{

double speedLimit =0;
double speed =0;

float getSpeed(double speedLimit);

    {
        while (speedLimit > 70 || speedLimit <=>
      {
        cout<"the speed="" limit="" can="" only="" be="" between="" 20="" mph="" -="" 70=""><>

        cout <"enter the="" posted="" speed="" limit:="" "="">

        cin >> speedLimit;
    }
float getSpeed (double speed);
     while (speed > 500 || speed <=>
     {

        cout <"speed entered="" must="" be="" greater="" than="" 0="" mph"=""><>
         cout <"enter your="" speed:="" "="">
         cin >> speed;
     }

int totalSpeed(double speedLimit, double speed);
    {

    int totalSpeed = (speed-speedLimit);

    cout <"you were="" going="" "="">< totalspeed="">< "mph="" outside="" the="" speed="">

}

}    }