#c #while-loop
#c #while-цикл
Вопрос:
У меня есть задание написать программу на C для базового функционирования банкомата. Необходимо соблюдать правило, согласно которому за один день через банкомат может пройти не более 50 000 наличных, включая все переводы, снятие наличных или быстрые наличные. Я помещаю цикл while поверх всего тела, который использует целое число «atmlimit» для проверки условия. Каждая успешная денежная транзакция добавляется в него, но цикл по какой-то причине не работает.
#include <iostream>
using namespace std;
int main()
{
int pincode, pindigit1;
int availbalance, userchoice;
int transmoney, inputFC, ubinput;
int cwmoney, ctmoney, spam;
int atmlimit;
cout << "n Please enter your 4-digit pin code n Enter 'break' at any point to close the process n" << endl;
cin >> pincode;
pindigit1 = pincode;
for (pindigit1; pindigit1 >= 10; pindigit1 /= 10);
availbalance = 10000 * pindigit1;
while (atmlimit <= 50000) {
menu:
cout << "n *******************************************************************************" << endl;
cout << "n * Please choose the service your require by entering its respective number *" << endl;
cout << "n * [1] Fast Cash *" << endl;
cout << "n * [2] Cash Withdrawl *" << endl;
cout << "n * [3] Balance Inquiry *" << endl;
cout << "n * [4] Cash Transfer *" << endl;
cout << "n ******************************************************************************* n" << endl;
cin >> userchoice;
if (userchoice == 1) {
ta:
cout << "n Choose the amount of money you want to send by entering its respective number or enter 0 to go back to menu" << endl;
cout << "n [1] 500Rs [2] 1000Rs" << endl;
cout << "n [3] 2000Rs [4] 3000Rs" << endl;
cout << "n [5] 4000Rs [6] 5000Rs" << endl;
cout << "n [7] 10000Rs [8] 20000Rs n" << endl;
cin >> inputFC;
if (inputFC == 8) {
transmoney = 20000;
}
if (inputFC == 7) {
transmoney = 10000;
}
if (inputFC == 6) {
transmoney = 5000;
}
if (inputFC == 5) {
transmoney = 4000;
}
if (inputFC == 4) {
transmoney = 3000;
}
if (inputFC == 3) {
transmoney = 2000;
}
if (inputFC == 2) {
transmoney = 1000;
}
if (inputFC == 1) {
transmoney = 500;
}
if (inputFC == 0) {
goto menu;
}
if (transmoney <= availbalance) {
cout << "n Your transaction completed successfully" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = transmoney;
availbalance -= transmoney;
goto menu;
}
if (transmoney > availbalance) {
cout << "n You have insufficient balance to perform this transaction. Enter '0' to go back the menu or '1' to change the transaction amout" << endl;
cin >> ubinput;
}
if (ubinput == 0) {
goto menu;
}
if (ubinput == 1) {
goto ta;
}
}
if (userchoice == 2) {
cwmenu:
cout << "n Please enter the amount of cash you want to withdraw from your bank account n Enter 0 if you want to return to the menu n" << endl;
cin >> cwmoney;
cout << cwmoney; //TBR
if (cwmoney == 0) {
goto menu;
}
if (cwmoney <= availbalance) {
cout << "n Your transaction bas been processed, Thank you!n" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = cwmoney;
availbalance -= cwmoney;
goto menu;
}
else if (cwmoney > availbalance) {
cout << "n You have insufficient balance for this transaction. n" << endl;
goto cwmenu;
}
}
if (userchoice == 3) {
cout << "n Your current bank balance is " << availbalance << "Rs" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
goto menu;
}
if (userchoice == 4) {
ctmenu:
cout << "n Enter the receiver's 6 digit bank account number n Enter 0 to return to the menu" << endl;
cin >> spam;
if (spam == 0) {
goto menu;
}
cout << "n Please enter the amount of cash you want to transfer/send n Enter 0 if you want to return to the menu n" << endl;
cin >> ctmoney;
if (ctmoney == 0) {
goto menu;
}
cout << "n" << endl;
cout << ctmoney << endl; //TBD
if (ctmoney <= availbalance) {
cout << "n Your transaction bas been processed, Thank you!n" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = availbalance;
availbalance -= ctmoney;
goto menu;
}
else if (ctmoney > availbalance) {
cout << "n You have insufficient balance for this transaction. n" << endl;
goto ctmenu;
}
}
}
cout << "n You have reached the maximum amount of cash flow through your account, Please try later n" << endl;
}
После всех предложений я переписал код следующим образом:
#include <iostream>
using namespace std;
int main()
{
int pincode, pindigit1;
int availbalance, userchoice;
int transmoney, inputFC;
int cwmoney, ctmoney;
int atmlimit = 0;
cout << "n Please enter your 4-digit pin code n Enter 'break' at any point to close the process n" << endl;
cin >> pincode;
pindigit1 = pincode;
for (pindigit1 = pincode; pindigit1 >= 10; pindigit1 /= 10)
;
cout << pindigit1 << endl; //TBR
availbalance = 10000 * pindigit1;
cout << availbalance << endl; //TBR
while (atmlimit <= 50000) {
cout << "n *******************************************************************************" << endl;
cout << "n * Please choose the service you require by entering its respective number *" << endl;
cout << "n * [1] Fast Cash *" << endl;
cout << "n * [2] Cash Withdrawl *" << endl;
cout << "n * [3] Balance Inquiry *" << endl;
cout << "n * [4] Cash Transfer *" << endl;
cout << "n ******************************************************************************* n" << endl;
cin >> userchoice;
switch (userchoice) {
case 1:
cout << "n Choose the amount of money you want to send by entering its respective number or enter 0 to go back to menu" << endl;
cout << "n [1] 500Rs [2] 1000Rs" << endl;
cout << "n [3] 2000Rs [4] 3000Rs" << endl;
cout << "n [5] 4000Rs [6] 5000Rs" << endl;
cout << "n [7] 10000Rs [8] 20000Rs n" << endl;
cin >> inputFC;
if (inputFC == 8) {
transmoney = 20000;
}
if (inputFC == 7) {
transmoney = 10000;
}
if (inputFC == 6) {
transmoney = 5000;
}
if (inputFC == 5) {
transmoney = 4000;
}
if (inputFC == 4) {
transmoney = 3000;
}
if (inputFC == 3) {
transmoney = 2000;
}
if (inputFC == 2) {
transmoney = 1000;
}
if (inputFC == 1) {
transmoney = 500;
}
if (inputFC == 0) {
continue;
}
if (transmoney <= availbalance) {
cout << "n Your transaction completed successfully" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = transmoney;
availbalance -= transmoney;
cout << atmlimit << endl; //TBD
cout << availbalance; //TBD
continue;
}
if (transmoney > availbalance) {
cout << "n You have insufficient balance to perform this transaction" << endl;
continue;
}
break;
case 2:
cout << "n Please enter the amount of cash you want to withdraw from your bank account n Enter 0 if you want to return to the menu n" << endl;
cin >> cwmoney;
cout << cwmoney; //TBR
if (cwmoney == 0) {
continue;
}
if (cwmoney <= availbalance) {
cout << "n Your transaction bas been processed, Thank you!n" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = cwmoney;
availbalance -= cwmoney;
cout << atmlimit << endl;
cout << availbalance;
continue;
}
else if (cwmoney > availbalance) {
cout << "n You have insufficient balance for this transaction. n" << endl;
continue;
}
break;
case 3:
cout << "n Your current bank balance is idk" << availbalance << "Rs" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
break;
case 4:
cout << "n Please enter the amount of cash you want to transfer/send n Enter 0 if you want to return to the menu n" << endl;
cin >> ctmoney;
if (ctmoney == 0) {
continue;
}
cout << "n" << endl;
cout << ctmoney << endl; //TBD
if (ctmoney <= availbalance) {
cout << "n Your transaction bas been processed, Thank you!n" << endl;
cout << "n ------------------------------------------------------------------------------------------------------------------------------------------- n" << endl;
atmlimit = ctmoney;
availbalance -= ctmoney;
cout << atmlimit << endl; //TBD
cout << availbalance;
continue;
}
else if (ctmoney > availbalance) {
cout << "n You have insufficient balance for this transaction. n" << endl;
continue;
}
break;
}
}
cout << "n You have reached the maximum amount of cash flow through your account, Please try later n" << endl;
}
Комментарии:
1. вам необходимо инициализировать
int atmlimit = 0;2. Включение ошибок и предупреждений приводит к явному виновнику
3. В него добавляется каждая успешная транзакция с наличными, но по какой-то причине цикл не работает , я считаю, что все экземпляры
goto menu;могут быть заменены наcontinue;, и это снова оценит условие. Ни одно из них не приводит к вычислению условия.4. Боже мой, не используй goto.
5. Является ли это обратным скомпилированным кодом? Почему так много
ifs amp;gotos? Замените их правильными конструкциями (switch,break,continue) в первую очередь.
Ответ №1:
Исправлена проблема путем замены операторов goto на break / continue и некоторыми другими небольшими изменениями, упомянутыми в комментариях.