[英]Trouble executing program that uses both pass by reference and pass by value parameter
I keep getting errors when I try to execute the following program, and I do not know if something is wrong with one of my functions or what(the way I wrote it). 当我尝试执行以下程序时,我不断收到错误消息,我不知道我的函数之一或内容(编写方式)是否有问题。 I know something is wrong with line 129 in my code, but whenever I try to make changes other syntax errors show up.
我知道代码中的第129行有问题,但是每当我尝试进行更改时,都会出现其他语法错误。 Basically there is something wrong with my syntax and since I'm learning debugging I'm having a hard time with this.
基本上,我的语法有问题,并且由于我正在学习调试,因此很难。
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
//declare global functions
void num_units( int& input1 );
void student_fees( float& num1, int& var1 );
void state_resident( bool& cond1 );
char parking_decal( char& ans1 );
void other_student_services_fees( char& ans2, char& ans3 );
int main ()
{
bool not_a_resident = false;
char want_as_sticker = 'x', want_parking_decal = 'y', want_id_card = 'z';
string semester_session = "not enrolled yet";
int units = 0, semester = 0;
float price_per_unit = 0, unit_fees = 0, student_services_fee = 0, parking_decal_fee = 0, total_fees = 0, as_sticker_fee = 19.50, id_card_fee = 13.00;
num_units( units );
student_fees( student_services_fee, semester );
state_resident( not_a_resident );
parking_decal( want_parking_decal );
other_student_services_fees( want_as_sticker, want_id_card );
//determine total student services fee depending on user's preferences
if ( want_as_sticker == 'n' )
student_services_fee = student_services_fee - as_sticker_fee;
if ( want_parking_decal == 'n' )
student_services_fee = student_services_fee - parking_decal_fee;
if ( want_id_card == 'n' )
student_services_fee = student_services_fee - id_card_fee;
//determine price per unit
if ( not_a_resident == false )
price_per_unit = 325.00;
else
price_per_unit = 46.00;
//determine unit_fees
unit_fees = price_per_unit * units;
//determine parking decal price
if ( ( parking_decal( want_parking_decal ) == 'y' ) && ( (semester == 1) || (semester == 3) ))
parking_decal_fee = 45.00;
else
parking_decal_fee = 85.00;
//calculate total fees
total_fees = unit_fees + student_services_fee;
if ( semester == 0 )
semester_session = "Fall";
else if ( semester == 1)
semester_session = "Winter";
else if ( semester == 2)
semester_session = "Spring";
else
semester_session = "Summer";
cout << "For " << semester_session + " " << "your total fees are $ " << total_fees;
return 0;
}
void num_units( int& input1 )
{
cout << "SMC Fee Calculator" << endl;
cout << "Enter number of units enrolled: ";
cin >> input1;
cout << endl;
}
//calculates the unit fees
void student_fees( float& num1, int& var1 )
{
do
{
//determines semester unit price
cout << "Is this Fall[0], Winter[1], Spring[2] or Summer[3] session: ";
cin >> var1;
if ( var1 == 0 || var1 == 2 )
num1 = 50.50;
else if ( semester == 1 || semester == 3 )
num1 = 48.50;
else
cout << endl;
cout << "I'm sorry. That's an improper selection. Please try again.\n";
}while ( var1 <= 4 && var1 >= 0 );
}
void state_resident( bool& cond1 )
{
cout << "Are you a state resident[0] or not[1]: ";
cin >> cond1;
cout << endl;
}
char parking_decal( char& ans1 )
{
do
{
cout << "Want a parking decal? [y/n]: ";
cin >> ans1;
if ( (ans1 != 'y') || (ans1 != 'n') )
cout << "I'm sorry. That's not a valid input. Please try again.\n";
else
break;
}while ( (ans1 != 'y') || (ans1 != 'n') );
cout << endl;
return ans1;
}
void other_studentservices_fees( char& ans2, char& ans3 )
{
//Ask if user wants an AS sticker.
do
{
cout << "Want an AS sticker? [y/n]: ";
cin >> ans2;
//proof answer
if ( (ans2 != 'y') || (ans2 != 'n') )
cout << "I'm sorry. That's not a valid input. Please try again.\n";
else
break;
}
cout << endl;
//Ask if user wants an AS sticker.
do
{
cout << endl << "Want an ID card? [y/n]: ";
cin >>ans3;
//proof answer
if ( (ans2 != 'y') || (ans2 != 'n') )
cout << "I'm sorry. That's not a valid input. Please try again.\n";
else
break;
}
cout << endl;
}
Output should look like this: 输出应如下所示:
SMC Fee Calculator
Enter number of units enrolled: 18
Is this Fall[0], Winter[1], Spring[2] or Summer[3] session: 0
Are you a state resident[0] or not[1]: 0
Want a parking decal? [y/n]: n
Want an AS sticker? [y/n]: n
Want an ID card? [y/n]: n
For Fall semester, your total fees are $ 846.00
SMC Fee Calculator
Enter number of units enrolled: 6
Is this Fall[0], Winter[1], Spring[2] or Summer[3] session: 1
Are you a state resident[0] or not[1]: 1
Want a parking decal? [y/n]: y
Want an AS sticker? [y/n]: y
Want an ID card? [y/n]: y
For Winter semester, your total fees are $ 2043.50
I've looked at your program for 5 min and there are so many errors I'm not even sure where to begin... 我已经看了您的程序5分钟,有很多错误,我什至不知道从哪里开始...
At that point I just gave up on you. 那时我只是放弃了你。 We are not here to do your homework for you, those are basics errors you could have found yourself.
我们不是在这里为您做功课,这些是您可能会发现的基本错误。
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