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cs-142:allowance-with-menu [2014/10/02 09:22]
kseppi 		cs-142:allowance-with-menu [2016/11/02 17:25] (current)
kseppi
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 +This version has a numeric menu, there is an other example after it that uses a string for the choices in the menu. Please take a look at both.
 +
 <code cpp> <code cpp>
 #include <​iostream>​ #include <​iostream>​
-#include <string>+#include <limits>​ 
 +#include <​stdlib.h>
 #include <​time.h>​ #include <​time.h>​
 +#include <​iomanip>​
 +#include <​tgmath.h>​
  
 using namespace std; using namespace std;
  
 int main() { int main() {
- +    const int STOP_TESTS = 0; 
- srand(time(0)); +    const int INVALID_CHOICE = -1; 
- string ans; +    const int TEST_LINC_AND_MAX = 1; 
- +    const int TEST_CINDY_AND_RANDI = 2; 
- do { +    const int MONTHS_IN_YEAR = 12; 
- cout << "\"Q\" -- quit\n"; +    const double LINC_INITIAL = 0.10; 
- cout << ​"​\"​C\" -- compute\n"; +    const double MAX_INITIAL = 0.01; 
- cout << ​"​\"​S\" -- say something nice\n"; +    const double RANDI_MIN = 0.30; 
- cout << "what do you want me to do? "; +    const double RANDI_MAX = 5.0; 
- cin >> ​ans; +    double lincsTotal = 0; 
- // getline(cin, ans); +    double maxsTotal = 0; 
- +    double lincsAverage = 0; 
- if ((ans == "​C"​) || (ans == "​c"​)) { +    double maxsAverage = 0; 
- double duanestotal = 0.01; +    double cindisTotal = 0; 
- double kevinstotal ​= 0.1; +    double randisTotal = 0; 
- double cindystotal ​= 0.1; +     
- +    double lincsCurrent = 0; 
- double duanescurrent ​= 0.01; +    double maxsCurrent = 0; 
- double kevinscurrent ​= 0.10; +    double cindisCurrent = 0; 
- double cindyscurrent = 0.10; +    double randisCurrent = 0; 
- +    int cindiMoreThanRandi = 0; 
- +     
- for (int i = 1; i <= 12; i++) { +    int choice = 0; 
- +     
- cout << "​For ​the month " << i << endl; +    ​srand(42); // for now, do the same random thing every time 
- cout << "kevins ​allowance this month = " << ​kevinscurrent ​<< " and running total " << ​kevinstotal ​<< endl; +    //srand(time(NULL)); 
- cout << "duanes ​allowance this month = " << ​duanescurrent ​<< " and running total " << ​duanestotal << endl << endl; +    cout << fixed << setprecision(2); 
- cout << "​cindys allowance this month = " << cindyscurrent << " and running total " << cindystotal ​<< endl << endl; +     
- +    cout << "​Sarting tool for simulating allowances"​ << endl; 
- // get ready for the next month... +     
- duanescurrent ​*= 2; +    while (true) ​{ 
- kevinscurrent ​+= 0.10; +         
- cindyscurrent = cindyscurrent + double(rand() % 11 - 5) / 100.0; +        cout << endl; 
- +        ​cout << "MENU: Please select one of the following options:" ​<< endl; 
- duanestotal ​+= duanescurrent; +        cout << endl; 
- kevinstotal ​+= kevinscurrent; +        cout << STOP_TESTS << ​" - Quit the program" ​<< endl; 
- cindystotal += cindyscurrent; +        cout << ​TEST_LINC_AND_MAX << ​" - Simulate allowance for Linc and Max" ​<< endl; 
- } +        cout << ​TEST_CINDY_AND_RANDI << ​" - Simulate allowance for Cindi and Randi" ​<< endl; 
- +        cout << endl; 
- } +         
- else if ((ans == "​S"​) || (ans == "s")) { +        ​cout << "Enter your selection now: "; 
- cout << "Something nice.\n"; +        cin >> ​choice; 
- } +        cin.ignore(numeric_limits<​streamsize>::​max(), '​\n'​); 
- else if ((ans == "Q") || (ans == "q")) { +        cout << endl; 
- cout << "Ok, bye\n"; +        ​ 
- } +        if (choice ​== STOP_TESTS) { 
- else { +            break; 
- cout << "invalid input, try again.\n"; +        } 
- } +        else if (choice ​== 1) { 
- +            // We have to reset these every time we pick this option 
-  +            ​lincsCurrent ​= LINC_INITIAL; 
- } while ((ans != "​Q"​) && (ans != "​q"​)); +            ​maxsCurrent ​= MAX_INITIAL; 
- +            ​lincsTotal ​= lincsCurrent; 
- //system("​pause"​);​ +            ​maxsTotal ​= maxsCurrent; 
- return 0;+             
 +            cout << "​Simulate allowance for Linc and Max:" << endl; 
 +            for (int i = 1; i <= MONTHS_IN_YEAR; i++) { 
 +                 
 +                cout << "For month " << i << endl; 
 +                cout << "Linc\'​s ​allowance this month = " << ​lincsCurrent ​<< " and running total " << ​lincsTotal ​<< endl; 
 +                cout << "Max\'​s ​allowance this month = " << ​maxsCurrent ​<< " and running total " << ​maxsTotal ​<< endl << endl; 
 +                 
 +                // get ready for the next month... 
 +                ​maxsCurrent ​*= 2; // max get's doubled 
 +                ​lincsCurrent ​+= 0.10; // linc gets incremented by 0.1 
 +                 
 +                ​maxsTotal ​+= maxsCurrent; 
 +                ​lincsTotal ​+= lincsCurrent; 
 +            } 
 +             
 +            lincsAverage ​= lincsTotal/​MONTHS_IN_YEAR; 
 +            ​maxsAverage = maxsTotal/​MONTHS_IN_YEAR;​ 
 +             
 +            cout << "​Summary:​ " << endl; 
 +            cout << "​Linc\'​s average allowance: " << lincsAverage << endl; 
 +            cout << "​Max\'​s average allowance: " << maxsAverage << endl; 
 +             
 +            cout << endl; 
 +             
 +        } 
 +        else if (choice ​== 2) { 
 +            // We have to reset these every time we pick this option 
 +            cindisTotal ​= 0; 
 +            randisTotal ​= 0; 
 +            cindiMoreThanRandi = 0; 
 +             
 +            cout << ​"Simulate allowance for Cindi and Randi:" ​<< endl; 
 +            for (int i = 1; i <= MONTHS_IN_YEAR;​ i++) { 
 +         
 +                // get ready for the next month... 
 +                // randomly choose a value for Randi 
 +                randisCurrent = RANDI_MIN + ((RANDI_MAX - RANDI_MIN) * (rand() / (static_cast <​double>​(RAND_MAX))));​ 
 +                 
 +                // Ask for the value from cin for cindi 
 +                ​cout << "What value should I use for Cindi'​s allowance? ​"; 
 +                cin >> cindisCurrent;​ 
 +                 
 +                cout << "For month " << i << endl; 
 +                cout << "​Cindi\'​s allowance this month = " ​<< cindisCurrent << ​" ​and running total " << cindisTotal << endl; 
 +                cout << "​Randi\'​s allowance this month = " ​<< randisCurrent << ​" ​and running total " << randisTotal << endl << endl; 
 +                 
 +                 
 +                cindisTotal += cindisCurrent;​ 
 +                randisTotal += randisCurrent;​ 
 +                if (cindisCurrent > randisCurrent) { 
 +                    ​cindiMoreThanRandi++;​ 
 +                } 
 +            } 
 +            ​cout << "Summary: ​" ​<< endl; 
 +            cout << "Cindi got more than Randi " << cindiMoreThanRandi << " times" << endl; 
 +            cout << endl; 
 +        } 
 +        else { 
 +            cout << "INVALID SELECTION. ​ Please enter a valid option." ​<< endl; 
 +        } 
 +         
 +        ​choice ​= INVALID_CHOICE; 
 +         
 +         
 +    } 
 +     
 +    ​system("​pause"​);​ 
 +     
 +    ​return 0;
 } }
-</​code>​ 
  
-=Here it is with a numeric menu= 
- 
-This will loop forever on bad int's. 
- 
-<code cpp> 
-#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; 
-} 
 </​code>​ </​code>​
  
-=Here it is with a more cleaver numeric menu= +Here is a version that uses strings for the choices, this is convenient because I can just use the string instead ​of a number that implies the option name.
- +
-Note the use of a string+
  
 <code cpp> <code cpp>
 #include <​iostream>​ #include <​iostream>​
-#include <string> +#include <limits> 
-#include <time.h> +#include <stdlib.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; +
-} +
-</​code>​ +
-A dumb version: +
-<code cpp> +
-#include <​iostream>​ +
-#include <string>+
 #include <​time.h>​ #include <​time.h>​
 +#include <​iomanip>​
 +#include <​tgmath.h>​
 +#include <​limits>​
  
 using namespace std; using namespace std;
  
 int main() { int main() {
 +    const int MONTHS_IN_YEAR = 12;
 +    const double LINC_INITIAL = 0.10;
 +    const double MAX_INITIAL = 0.01;
 +    const double RANDI_MIN = 0.30;
 +    const double RANDI_MAX = 5.0;
 +    double lincsTotal = 0;
 +    double maxsTotal = 0;
 +    double lincsAverage = 0;
 +    double maxsAverage = 0;
 +    double cindisTotal = 0;
 +    double randisTotal = 0;
 +    ​
 +    double lincsCurrent = 0;
 +    double maxsCurrent = 0;
 +    double cindisCurrent = 0;
 +    double randisCurrent = 0;
 +    int cindiMoreThanRandi = 0;
 +    ​
 +    string choice = "";​
 +    ​
 +    srand(42); // for now, do the same random thing every time
 +    //​srand(time(NULL));​
 +    cout << fixed << setprecision(2);​
 +    ​
 +    cout << "Tool for simulating allowances - type \"​list\"​ to see available choices"​ << endl;
 +    cout << endl;
 +    while (true) {
 +        cout << "​Choice:​ ";
 +        getline(cin,​choice);​
 +        cout << endl;
 +        ​
 +        if ("​quit"​ == choice) {
 +            break;
 +        }
 +        else if ("​list"​ == choice) {
 +            cout << endl;
 +            cout << "​Program options are:" << endl;
 +            cout << endl;
 +            cout << "quit - Quit the program"​ << endl;
 +            cout << "lm - Simulate allowance for Linc and Max" << endl;
 +            cout << "cr - Simulate allowance for Cindi and Randi" << endl;
 +        }
 +        ​
 +        else if ("​lm"​ == choice) {
 +            // We have to reset these every time we pick this option
 +            lincsCurrent = LINC_INITIAL;​
 +            maxsCurrent = MAX_INITIAL;​
 +            lincsTotal = lincsCurrent;​
 +            maxsTotal = maxsCurrent;​
 +            ​
 +            cout << "​Simulate allowance for Linc and Max:" << endl;
 +            for (int i = 1; i <= MONTHS_IN_YEAR;​ i++) {
 +                ​
 +                cout << "For month " << i << endl;
 +                cout << "​Linc\'​s allowance this month = " << lincsCurrent << " and running total " << lincsTotal << endl;
 +                cout << "​Max\'​s allowance this month = " << maxsCurrent << " and running total " << maxsTotal << endl << endl;
 +                ​
 +                // get ready for the next month...
 +                maxsCurrent *= 2; // max get's doubled
 +                lincsCurrent += 0.10; // linc gets incremented by 0.1
 +                ​
 +                maxsTotal += maxsCurrent;​
 +                lincsTotal += lincsCurrent;​
 +            }
 +            ​
 +            lincsAverage = lincsTotal/​MONTHS_IN_YEAR;​
 +            maxsAverage = maxsTotal/​MONTHS_IN_YEAR;​
 +            ​
 +            cout << "​Summary:​ " << endl;
 +            cout << "​Linc\'​s average allowance: " << lincsAverage << endl;
 +            cout << "​Max\'​s average allowance: " << maxsAverage << endl;
 +            ​
 +            cout << endl;
 +            ​
 +        }
 +        else if ("​cr"​ == choice) {
 +            // We have to reset these every time we pick this option
 +            cindisTotal = 0;
 +            randisTotal = 0;
 +            cindiMoreThanRandi = 0;
 +            ​
 +            cout << "​Simulate allowance for Cindi and Randi:"​ << endl;
 +            for (int i = 1; i <= MONTHS_IN_YEAR;​ i++) {
 +                ​
 +                // get ready for the next month...
 +                // randomly choose a value for Randi
 +                randisCurrent = RANDI_MIN + ((RANDI_MAX - RANDI_MIN) * (rand() / (static_cast <​double>​(RAND_MAX))));​
 +                ​
 +                // Ask for the value from cin for cindi
 +                cout << "What value should I use for Cindi'​s allowance? ";
 +                cin >> cindisCurrent;​
 +                cin.ignore(numeric_limits<​streamsize>::​max(),​ '​\n'​);​
  
- srand(time(0));​ +                ​ 
- string ans; +                cout << "For month " << i << endl; 
- +                cout << "Cindi\'​s ​allowance this month = " << ​cindisCurrent ​<< " and running total " << ​cindisTotal ​<< endl; 
- +                cout << "Randi\'​s ​allowance this month = " << ​randisCurrent ​<< " and running total " << ​randisTotal << endl << endl; 
- int duanestotal = 1; +                 
- int kevinstotal = 10; +                 
- int cindystotal = 10; +                cindisTotal += cindisCurrent;​ 
- +                randisTotal += randisCurrent;​ 
- int duanescurrent = 1; +                if (cindisCurrent > randisCurrent) { 
- int kevinscurrent = 10; +                    cindiMoreThanRandi++;​ 
- int cindyscurrent = 10; +                } 
-  +            } 
- int cindysinc = 0; +            ​cout << "Summary: ​" << ​endl; 
- +            cout << "Cindi got more than Randi " << ​cindiMoreThanRandi << " times" ​<< endl; 
- +            cout << endl; 
- +        } 
- for (int i = 1; i <= 12; i++) { +        else { 
- +            cout << "​INVALID SELECTION.  ​Please enter a valid option." << endl; 
- +        } 
- cout << "​For ​the month " << i << endl; +        cout << endl; 
- cout << "kevins ​allowance this month = " << ​kevinscurrent ​<< " and running total " << ​kevinstotal ​<< endl; +         
- cout << "duanes ​allowance this month = " << ​duanescurrent ​<< " and running total " << ​duanestotal ​<< endl; +    } 
- cout << "cindys allowance this month = " << ​cindyscurrent ​<< " ​and running total " << ​cindystotal ​<< endl << endl; +     
- +    //system("​pause"​);​ 
- // get ready for the next month... +     
- duanescurrent *= 2; +    ​return 0;
- kevinscurrent += 10; +
- cindysinc = rand() % 11 + 5; +
- cindyscurrent = cindyscurrent + cindysinc;​ +
- +
- +
- +
- duanestotal += duanescurrent;​ +
- kevinstotal += kevinscurrent;​ +
- cindystotal += cindyscurrent;​ +
- }  +
- +
- system("​pause"​);​ +
- return 0;+
 } }
 </​code>​ </​code>​
cs-142/allowance-with-menu.1412263361.txt.gz · Last modified: 2014/10/02 09:22 by kseppi
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