I am trying to write a code that takes an input file and organizes it and computes some values. However, I am having a problem with my getName function that is supposed to assign a first and last name to call by reference parameters by using the get member function to sum up characters in the input file if a -1 is read. Here are the error arguments for the code:
main.cpp:7:14: error: variable or field 'getName' declared void
main.cpp:7:14: error: 'ifstream' was not declared in this scope
main.cpp:7:24: error: 'shoppingCartInput' was not declared in this scope
main.cpp:7:43: error: 'string' was not declared in this scope
main.cpp:7:51: error: 'firstname' was not declared in this scope
main.cpp:7:62: error: 'string' was not declared in this scope
main.cpp:7:70: error: 'lastname' was not declared in this scope
main.cpp:102:50: error: 'getName' was not declared in this scope
Here is the code:
#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>
#include <cctype>
void getName(ifstream& shoppingCartInput, string& firstname, string& lastname);
using namespace std;
int main()
{
// declerations
string infile_name = "";
string shopper = "";
string firstname ="";
string lastname = "";
int quantity;
double price = 0.0, leastExpPrice = 0, mostExpPrice = 0;
string item, leastExpItem, mostExpItem;
double totalCost = 0.0;
//1) Open Your File
cout << "please enter the name of the input file:";
cin >> infile_name;
cout << "\n";
ifstream shoppingCartInput;
ofstream shoppingCartOutput;
shoppingCartInput.open(infile_name.c_str());
if(shoppingCartInput.fail( )) {
cout << "Input file opening failed.\n";
exit(1);
}
shoppingCartOutput.open("output_file.dat");
if(shoppingCartOutput.fail( )) {
cout << "Output file opening failed.\n";
exit(1);
}
//2) Read the first line
shoppingCartInput >> quantity >> price >> item;
//printing the line to the console (properly organized)
shoppingCartOutput.setf(ios::fixed);
shoppingCartOutput.setf(ios::showpoint);
shoppingCartOutput.setf(ios::left);
shoppingCartOutput.width(15);
shoppingCartOutput << item << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(3);
shoppingCartOutput << quantity << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(6);
shoppingCartOutput.precision(2);
shoppingCartOutput << price << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(7);
shoppingCartOutput.precision(2);
shoppingCartOutput << (quantity * price) << endl;
//set it as the most expensive
//set it as the least expensive
leastExpPrice = price;
leastExpItem = item;
mostExpPrice = price;
mostExpItem=item;
//initialize total cost to get the cost of the first line of data
totalCost = (quantity * price);
//3) Read until the end of the file
while(!(shoppingCartInput.eof())) {
while(quantity != -1) {
shoppingCartInput >> quantity >> price >> item;
//printing the line to the console (properly organized)
shoppingCartOutput.setf(ios::fixed);
shoppingCartOutput.unsetf(ios::right);
shoppingCartOutput.setf(ios::showpoint);
shoppingCartOutput.setf(ios::left);
shoppingCartOutput.width(15);
shoppingCartOutput << item << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(3);
shoppingCartOutput << quantity << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(6);
shoppingCartOutput.precision(2);
shoppingCartOutput << price << " ";
shoppingCartOutput.setf(ios::right);
shoppingCartOutput.width(7);
shoppingCartOutput.precision(2);
shoppingCartOutput << (quantity * price) << endl;
if(price < leastExpPrice) {
leastExpPrice = price;
leastExpItem = item;
}
if(price > mostExpPrice) {
mostExpPrice = price;
mostExpItem=item;
}
totalCost += (quantity * price);
}
if (quantity == (-1)) {
string first = "";
string last = "";
getName(shoppingCartInput, firstname, lastname);
shopper = firstname + " " + lastname;
shoppingCartOutput << "\ncheapest item = " << leastExpItem <<
endl;
shoppingCartOutput << "most expensive item = " << mostExpIte <<
endl;
shoppingCartOutput << "total cost = " << totalCost << endl;
shoppingCartOutput.unsetf(ios::right);
shoppingCartOutput.setf(ios::left);
shoppingCartOutput << "shopper = " << shopper;
}
}
shoppingCartInput.close();
shoppingCartOutput.close();
return 0;
}
void getName(ifstream& shoppingCartInput, std::string& firstname, std::string&
lastname)
{
char letter;
do {
shoppingCartInput.get(letter);
firstname += letter - 1;
} while (letter != ',');
do {
shoppingCartInput.get(letter);
lastname += letter;
} while (letter != '\n' || letter != 'r');
}
That's std::ifstream
to you. Or else, add using namespace std;
after all #includes and before the rest of the code.
change:
void getName(ifstream& shoppingCartInput, string& firstname, string& lastname);
using namespace std;
to:
using namespace std;
void getName(ifstream& shoppingCartInput, string& firstname, string& lastname);
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