Untitled

#include <iostream>using namespace std;int main() {    int menu, choice;    int metresSecond, kilometresHour, tempF, tempC;	float usd, gbp, euro, oneGbpToEuro, oneGbpToUsd;	    cout << "For conversions involving speed press 1" << endl;    cout << "For conversions involving temperature press 2" << endl;		cout << "For conversions involving money press 3" << endl;    cin >> menu;    switch(menu) {    case 1:                  cout << "For ms^-1 to kmh^-1 press 1" << endl;         cout << "For kmh^-1 to ms^-1 press 2" << endl;         cin >> choice;            switch(choice) {                            case 1:                            cout << "Please enter your value in ms^-1" << endl;                            cin >> metresSecond;                            kilometresHour = ((metresSecond * 3600)/1000);                            cout << "Your speed is: ";                            cout << kilometresHour;                            cout << "km/h\n";                            break;                            case 2:                            cout << "Please enter your value in kmh^-1" << endl;                            cin >> kilometresHour;                            metresSecond = ((kilometresHour * 1000)/3600);                            cout << "Your speed is: ";                            cout << metresSecond;                            cout << "m/s\n";                            break;                            default:                            cout<<"This isn't a valid option.";                            return(-1);                            break;                            }		 break;             case 2:         cout << "For Celcius to Fahrenheit press 1" << endl;         cout << "For Fahrenheit to Celcius press 2" << endl;         cin >> choice;		 switch (choice) {							case 1:							cout << "Please enter your value in Celcius" << endl;							cin >> tempC;							tempF = ((tempC * 9) /5) + 32;							cout << "Your value is: ";							cout << tempF;							cout << " Degrees Farenheit";							break;							case 2:							cout << "Please enter your value in Fahrenheit" << endl;							cin >> tempF;							tempC = ((tempF - 32) * 5) / 9;							cout << "Your value is; ";							cout << tempC;							cout << "Degrees Celcius";							break;		 }	case 3:		cout << "For GBP to USD press 1" << endl;		cout << "For USD to GBP press 2" << endl;		cout << "For GBP to Euro press 3" << endl;		cout << "for Euro to GBP press 4" << endl;		cin >> choice;		switch (choice) {							case 1:							cout << "Please enter the conversion rate for 1 GBP to USD (eg 1.92)" << endl;							cin >> oneGbpToUsd;							cout << "Please enter your value in GBP" << endl;							cin >> gbp;							usd = (gbp * oneGbpToUsd);							cout << "Your answer is" << usd; 							cout << "Dollars" << endl;							break;							case 2:							cout << "Please enter the conversion rate for 1 GBP to USD (eg 1.92)" << endl;							cin >> oneGbpToUsd;							cout << "Please enter your value in USD" << endl;							cin >> usd;							gbp = (usd / oneGbpToUsd);							cout << "Your answer is" << gbp;							cout << "Pounds" << endl;							break;							}		break;    }   	system ( "pause" );    return 0;}