Commit 72db7d8

include_directories(${PROJECT_SOURCE_DIR}/primer/include)

add_executable(exercise_3_1_a exercise_3_1_a.cpp)

add_executable(exercise_3_1_b exercise_3_1_b.cpp)

add_executable(exercise3_2_a exercise3_2_a.cpp)

add_executable(exercise3_2_b exercise3_2_b.cpp)

#include <iostream>

#include <string>

using std::string;

using std::cin;

using std::cout;

using std::endl;

using std::getline;

int main()

{

string s;

while (getline(cin,s))

{

if (s == "q"){

break;

}

cout << s << endl;

}

return 0;

}

#include <iostream>

#include <string>

using std::string;

using std::cin;

using std::cout;

using std::endl;

int main() {

string s;

while (cin >> s) {

if(s == "q"){

break;

}

cout << s << endl;

}

return 0;

}

#include <iostream>

using std::cin;

using std::cout;

using std::endl;

int main()

{

int sum = 0;

for (int val = 1; val <= 10; ++val) sum += val;

cout << "Sum of 1 to 10 inclusive is " << sum << endl;

return 0;

}

#include <iostream>

#include <string>

#include "exercise2_42.h"

using std::cin;

using std::cout;

using std::endl;

using std::cerr;

int main() {

Sales_data data1, data2;

double price = 0;

cin >> data1.bookNo >> data1.units_sold >> price;

data1.revenue = data1.units_sold * price;

cout << " >1 "<< data1.bookNo << data1.units_sold << endl;

cin >> data2.bookNo >> data2.units_sold >> price;

cout << " >2 " << data2.bookNo << data2.units_sold << endl;

data2.revenue = data2.units_sold * price;

if (data1.bookNo == data2.bookNo) {

unsigned totalCnt = data1.units_sold + data2.units_sold;

double totalRevenue = data1.revenue + data2.revenue;

cout << data1.bookNo << " " << totalCnt

<< " " << totalRevenue << " ";

if (totalCnt != 0)

cout << totalRevenue / totalCnt << endl;

else

cout << "(no sales)" << endl;

return 0;

} else {

cerr << "Data must refer to the same ISBN" << endl;

return -1;

}

}

#ifndef LEARN_CPP_EXERCISE2_42_H

#define LEARN_CPP_EXERCISE2_42_H

#include <string>

#include <iostream>

struct Sales_data

{

std::string bookNo;

unsigned units_sold = 0;

double revenue = 0.0;

void CalcRevenue(double price);

double CalcAveragePrice();

void SetData(Sales_data data);

void AddData(Sales_data data);

void Print();

};

void Sales_data::CalcRevenue(double price)

{

revenue = units_sold * price;

}

void Sales_data::SetData(Sales_data data)

{

bookNo = data.bookNo;

units_sold = data.units_sold;

revenue = data.revenue;

}

void Sales_data::AddData(Sales_data data)

{

if (bookNo != data.bookNo) return;

units_sold += data.units_sold;

revenue += data.revenue;

}

double Sales_data::CalcAveragePrice()

{

if (units_sold != 0)

return revenue / units_sold;

else

return 0.0;

}

void Sales_data::Print()

{

std::cout << bookNo << " " << units_sold << " " << revenue << " ";

double averagePrice = CalcAveragePrice();

if (averagePrice != 0.0)

std::cout << averagePrice << std::endl;

else

std::cout << "(no sales)" << std::endl;

}

#endif //LEARN_CPP_EXERCISE2_42_H