Stopping sight distance (SSD) is defined as the distance needed for a driver to see an object on the roadway

   /*  *  C++ Program to Calculate Stopping Site Distance  */  #include <iostream> #include <cstdio> using namespace std;  #define gM 9.81 #define gF 32.2 #define cM 0.278 #define cF 1.47  int main() {   int ch;    cout << "Enter choice of units -" << endl;   cout << "1. Metric" << endl;   cout << "2. U.S. Customery Units" << endl;   cout << "Enter Choice: ";   cin >> ch;      int v;   float t, f, G;   double SSD;    switch(ch)   {     case 1:              cout << "Enter speed (km/h): ";             cin >> v;             cout << "Enter reaction time (sec): ";             cin >> t;             cout << "Enter Coefficient of friction: ";             cin >> f;             cout << "Enter Road Grade: ";             cin >> G;             SSD = (cM*v*t) + ((cM*cM*v*v)/(2*gM*(f + G)));             cout << "SSD: " << SSD << " m";             break;          case 2:             cout << "Enter speed (mi/h): ";             cin >> v;             cout << "Enter reaction time (sec): ";             cin >> t;             cout << "Enter Coefficient of friction: ";             cin >> f;             cout << "Enter Road Grade: ";             cin >> G;             SSD = (cF*v*t) + ((cF*cF*v*v)/(2*gF*(f + G)));             cout << "SSD: " << SSD << " ft";             break;   }      return 0; } /*  Program ends here */

Note: The complete program is tested and the output is attached, please wait the table is being updated. I will attach once it is done.