**This is an old revision of the document!**

#include <iostream>
#include <string>
#include <time.h>

using namespace std;

int main() {

srand(time(0));
string ans;

do {
cout << "\"Q\" -- quit\n";
cout << "\"C\" -- compute\n";
cout << "\"S\" -- say something nice\n";
cout << "what do you want me to do? ";
cin >> ans;
// getline(cin, ans);

if ((ans == "C") || (ans == "c")) {
double duanestotal = 0.01;
double kevinstotal = 0.1;
double cindystotal = 0.1;

double duanescurrent = 0.01;
double kevinscurrent = 0.10;
double cindyscurrent = 0.10;

for (int i = 1; i <= 12; i++) {

cout << "For the month " << i << endl;
cout << "kevins allowance this month = " << kevinscurrent << " and running total " << kevinstotal << endl;
cout << "duanes allowance this month = " << duanescurrent << " and running total " << duanestotal << endl << endl;
cout << "cindys allowance this month = " << cindyscurrent << " and running total " << cindystotal << endl << endl;

// get ready for the next month...
duanescurrent *= 2;
kevinscurrent += 0.10;
cindyscurrent = cindyscurrent + double(rand() % 11 - 5) / 100.0;

duanestotal += duanescurrent;
kevinstotal += kevinscurrent;
cindystotal += cindyscurrent;
}

}
else if ((ans == "S") || (ans == "s")) {
cout << "Something nice.\n";
}
else if ((ans == "Q") || (ans == "q")) {
cout << "Ok, bye\n";
}
else {
cout << "invalid input, try again.\n";
}

} while ((ans != "Q") && (ans != "q"));

//system("pause");
return 0;
}

# Here it is with a numeric menu

This will loop forever on bad int's.

#include <iostream>
#include <string>
#include <time.h>

using namespace std;

int main () {
srand(time(0));
int ans;

cout << "\"0\" -- quit\n";
cout << "\"1\" -- compute\n";
cout << "\"2\" -- say something nice\n";
cout << "what do you want me to do? ";
cin >> ans;
while((ans != 0)) {

if ((ans == 1)) {
double duanestotal = 0.01;
double kevinstotal = 0.1;
double cindystotal = 0.1;

double duanescurrent = 0.01;
double kevinscurrent = 0.10;
double cindyscurrent = 0.10;

for (int i = 1; i <= 12; i++) {

cout << "For the month " << i << endl;
cout << "kevins allowance this month = " << kevinscurrent << " and running total " << kevinstotal << endl;
cout << "duanes allowance this month = " << duanescurrent << " and running total " << duanestotal << endl << endl;
cout << "cindys allowance this month = " << cindyscurrent << " and running total " << cindystotal << endl << endl;

// get ready for the next month...
duanescurrent *= 2;
kevinscurrent += 0.10;
cindyscurrent = cindyscurrent+double(rand()%11-5)/100.0;

duanestotal += duanescurrent;
kevinstotal += kevinscurrent;
cindystotal += cindyscurrent;
}

}
else if ((ans == 2)) {
cout << "Something nice.\n";
}
else {
cout << "invalid input, try again.\n";
}

cout << "\"0\" -- quit\n";
cout << "\"1\" -- sing\n";
cout << "\"2\" -- say something nice.\n";
cout << "what do you want me to do? ";
cin >> ans;
}
//system("pause");
return 0;
}

# Here it is with a more cleaver numeric menu

Note the use of a string

#include <iostream>
#include <string>
#include <time.h>

using namespace std;

int main () {
srand(time(0));
string ans;

cout << "\"0\" -- quit\n";
cout << "\"1\" -- compute\n";
cout << "\"2\" -- say something nice\n";
cout << "what do you want me to do? ";
getline(cin,ans);
while((ans != "0")) {

if ((ans == "1")) {
double duanestotal = 0.01;
double kevinstotal = 0.1;
double cindystotal = 0.1;

double duanescurrent = 0.01;
double kevinscurrent = 0.10;
double cindyscurrent = 0.10;

for (int i = 1; i <= 12; i++) {

cout << "For the month " << i << endl;
cout << "kevins allowance this month = " << kevinscurrent << " and running total " << kevinstotal << endl;
cout << "duanes allowance this month = " << duanescurrent << " and running total " << duanestotal << endl << endl;
cout << "cindys allowance this month = " << cindyscurrent << " and running total " << cindystotal << endl << endl;

// get ready for the next month...
duanescurrent *= 2;
kevinscurrent += 0.10;
cindyscurrent = cindyscurrent+double(rand()%11-5)/100.0;

duanestotal += duanescurrent;
kevinstotal += kevinscurrent;
cindystotal += cindyscurrent;
}

}
else if ((ans == "2")) {
cout << "Something nice.\n";
}
else {
cout << "invalid input, try again.\n";
}

cout << "\"0\" -- quit\n";
cout << "\"1\" -- sing\n";
cout << "\"2\" -- say something nice.\n";
cout << "what do you want me to do? ";
getline(cin,ans);
}
//system("pause");
return 0;
}