Question about my program code

[happyherlean]

Hi!
I’m a beginner in C++ The program below inputs sevaral positive numbers with decimal points, analyzes these numbers, and outputs the result. The program works fine. But I wanted to make sure that a user puts only positive numbers or -1 to end repetition loop. So, I created couple of functions that would check the numbers, return them in case if they are positive or equal -1. In case they are negative, the program would output warning message and ask to enter the number again. It also work fine, but if I enter negative number and than enter positive number, the program saves negatives number, although I return the value from the function. Can anyone please explain me where my error is. Thanks!

P.S. I know that it’s possible to use template functions when you have a function that does the same operations, but with different types of variables. Can I use this concept with my problem when I have similar functions, but different names of variables? If yes, can anyone please show me how? Thanks!

#include <cstdlib><br /> #include <iostream><br /> #include <iomanip><br /> using namespace std;<br /> <br /> <br /> int get_acc_number(int);<br /> float get_b_balance(float);<br /> float get_charges(float);<br /> float get_credits(float);<br /> float get_cr_limit(float);<br /> void text(void);<br /> <br /> <br /> <br /> int main(int argc, char *argv[])<br /> {<br />      int acc_number = 0;<br />      float b_balance, charges, credits, cr_limit, balance;<br />      <br /> while (acc_number != -1)<br />    {<br />      cout << "Enter account number (-1 to end): ";<br />      cin >> acc_number;<br />      get_acc_number(acc_number);<br />      if (acc_number != -1)<br />        {<br />         cout << setiosflags (ios::fixed | ios::showpoint | ios::left);<br />         cout << setprecision (2) << "Enter beginning balance: ";<br />           cin >> b_balance;<br />           get_b_balance(b_balance);<br />           cout << "Enter total charges: ";<br />         cin >> charges;<br />         get_charges(charges);<br />         cout << "Enter total credits: ";<br />         cin >> credits;<br />         get_credits(credits);<br />         cout << "Enter credit limit: ";<br />         cin >> cr_limit;<br />         get_cr_limit(cr_limit);<br />         balance = b_balance + charges - credits;<br />         cout << "n";<br />         if (balance > cr_limit)<br />             {<br />                cout << setiosflags (ios::fixed | ios::showpoint | ios::left);<br />                 cout << "Account: " << setw (15) << acc_number << endl;<br />                 cout << "Credit limit: " << setw (15) << cr_limit << endl;<br />                 cout << "Balace: " << setw (15) << balance << endl;<br />                 cout << "Credit Limit exeededn" << endl;<br />              }<br />       <br />         }<br />    }<br /> <br />     system("PAUSE");<br />     return EXIT_SUCCESS;<br /> }<br /> <br /> int get_acc_number(int acc_number)<br />     {<br />      if (acc_number == -1 || acc_number >= 0)<br />           return acc_number;<br />           else<br />           {<br />               text();<br />               cout << "Enter account number (-1 to end): ";<br />               cin >> acc_number;<br />               return get_acc_number(acc_number);    <br />           }           <br />     }<br /> float get_b_balance(float b_balance)<br />     {<br />      if (b_balance >= 0)<br />           return b_balance;<br />           else<br />           {<br />               text();<br />               cout << "Enter beginning balance: ";<br />                cin >> b_balance;<br />               return get_b_balance(b_balance);    <br />           }          <br />        <br />     }<br /> float get_charges(float charges)<br /> {<br />      if (charges >= 0)<br />           return charges;<br />           else<br />           {<br />               text();<br />               cout << "Enter total charges: ";<br />               cin >> charges;<br />               return get_charges(charges);    <br />           }          <br />        <br /> }<br /> float get_credits(float credits)<br /> {<br />      if (credits >= 0)<br />           return credits;<br />           else<br />           {<br />               text();<br />               cout << "Enter total credits: ";<br />               cin >> credits;<br />               return get_credits(credits);    <br />           }          <br />        <br /> }<br /> float get_cr_limit(float cr_limit)<br /> {<br />      if (cr_limit >= 0)<br />           return cr_limit;<br />           else<br />           {<br />               text();<br />               cout << "Enter credit limit: ";<br />               cin >> cr_limit;<br />               return get_cr_limit(cr_limit);    <br />           }          <br />        <br /> }<br /> void text(void)<br /> {<br />      cout << "The number you entered is less than 0, "<br />           << "and, therefore invalid. "<br />           << "nPlease, try againn"<br />           << "n";<br /> }<br /> </iomanip></iostream></cstdlib>

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#include <cstdlib><br /> #include <iostream><br /> #include <iomanip><br /> using namespace std;<br /> <br /> <br /> int get_acc_number(int);<br /> float get_b_balance(float);<br /> float get_charges(float);<br /> float get_credits(float);<br /> float get_cr_limit(float);<br /> void text(void);<br /> <br /> <br /> <br /> int main(int argc, char *argv[])<br /> {<br />      int acc_number = 0;<br />      float b_balance, charges, credits, cr_limit, balance;<br />      <br /> while (acc_number != -1)<br />    {<br />      cout << "Enter account number (-1 to end): ";<br />      cin >> acc_number;<br />      get_acc_number(acc_number);<br />      if (acc_number != -1)<br />        {<br />          cout << setiosflags (ios::fixed | ios::showpoint | ios::left);<br />          cout << setprecision (2) <<  "Enter beginning balance: ";<br />           cin >> b_balance;<br />           get_b_balance(b_balance);<br />           cout << "Enter total charges: ";<br />          cin >> charges;<br />          get_charges(charges);<br />          cout << "Enter total credits: ";<br />          cin >> credits;<br />          get_credits(credits);<br />          cout << "Enter credit limit: ";<br />          cin >> cr_limit;<br />          get_cr_limit(cr_limit);<br />          balance = b_balance + charges - credits;<br />          cout << "n";<br />          if (balance > cr_limit)<br />             {<br />                cout << setiosflags (ios::fixed | ios::showpoint | ios::left);<br />                 cout << "Account: " << setw (15) << acc_number << endl;<br />                 cout << "Credit limit: " << setw (15) << cr_limit << endl;<br />                 cout << "Balace: " << setw (15) << balance << endl;<br />                 cout << "Credit Limit exeededn" << endl;<br />              }<br />       <br />         }<br />    }<br /> <br />     system("PAUSE");<br />     return EXIT_SUCCESS;<br /> }<br /> <br /> int get_acc_number(int acc_number)<br />     {<br />      if (acc_number == -1 || acc_number >= 0)<br />           return acc_number;<br />           else<br />           {<br />               text();<br />               cout << "Enter account number (-1 to end): ";<br />               cin >> acc_number;<br />               return get_acc_number(acc_number);    <br />           }           <br />     }<br /> float get_b_balance(float b_balance)<br />     {<br />      if (b_balance >= 0)<br />           return b_balance;<br />           else<br />           {<br />               text();<br />               cout << "Enter beginning balance: ";<br />                cin >> b_balance;<br />               return get_b_balance(b_balance);    <br />           }          <br />        <br />     }<br /> float get_charges(float charges)<br /> {<br />      if (charges >= 0)<br />           return charges;<br />           else<br />           {<br />               text();<br />               cout << "Enter total charges: ";<br />               cin >> charges;<br />               return get_charges(charges);    <br />           }          <br />        <br /> }<br /> float get_credits(float credits)<br /> {<br />      if (credits >= 0)<br />           return credits;<br />           else<br />           {<br />               text();<br />               cout << "Enter total credits: ";<br />               cin >> credits;<br />               return get_credits(credits);    <br />           }          <br />        <br /> }<br /> float get_cr_limit(float cr_limit)<br /> {<br />      if (cr_limit >= 0)<br />           return cr_limit;<br />           else<br />           {<br />               text();<br />               cout << "Enter credit limit: ";<br />               cin >> cr_limit;<br />               return get_cr_limit(cr_limit);    <br />           }          <br />        <br /> }<br /> void text(void)<br /> {<br />      cout << "The number you entered is less than 0, "<br />           << "and, therefore invalid. "<br />           << "nPlease, try againn"<br />           << "n";<br /> }<br /> </iomanip></iostream></cstdlib>

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