int main ( int argc, char *argv[] )
{
//Sales_data total;
Sales_data total = Sales_data();
Sales_data out = Sales_data("outnum", 8, 8.5);
print(cout, out) << endl;;
if(read(cin,total))
{
Sales_data trans = Sales_data("");
while (read(cin,trans))
{
if (total.isbn() == trans.isbn())
total.combine(trans);
else {
print(cout, total) << endl;
total = trans;
}
}
print(cout, total) << endl;
}
else
{
cerr << "No data?!" << endl;
}
return 0;
} /* ---------- end of function main ---------- */
void func(string infileName, string outfielName)
{
ifstream infile(infileName);
ofstream outfile(outfielName, ostream::app);
if (!infile.is_open())
{
cerr << "error in open file: " << infileName;
exit(1);
}
Sales_data total;
if (read(infile, total))
{
Sales_data trans;
while (read(infile, trans))
{
if (total.isbn() == trans.isbn())
{
total.combine(trans);
}
else
{
print(outfile, total) << endl;
total = trans;
}
}
print(outfile, total) << endl;
}
else
{
cerr << "no data?" << endl;
}
}
Sales_data add(const Sales_data &lhs, const Sales_data &rhs)
{
Sales_data sum = lhs;
sum.combine(rhs);
return sum;
}
int main(int argc, char const *argv[])
{
Sales_data total;
std::ifstream in(argv[1]);
if (read(in, total))
{
Sales_data trans;
while (read(in, trans))
{
if (total.isbn() == trans.isbn())
{
total.combine(trans);
}
else
{
print(cout, total) << endl;
total = trans;
}
}
print(cout, total) << endl;
}
else
{
cerr << "No data" << endl;
}
return 0;
}
// The transaction-processing program
// Mostly copied from 7.3.cpp with some modifications
int main() {
// variable to hold data for the next transaction
Sales_data total;
// read the first transaction and ensure that there are
// data to process
if (read(cin, total)) {
// variable to hold the running sum
Sales_data trans;
while (read(cin, trans)) {
// if we're still processing the same book
if (total.isbn() == trans.isbn()) {
// update the running total
total.combine(trans);
}
else {
// print results for the previous book
print(cout, total) << endl;
// Total now refers to the next book
total = trans;
}
}
// print the last transaction
print(cout, total) << endl;
}
else {
// no input! warn the user
cerr << "No data?!" << endl;
return -1; // indicate failure
}
return 0;
}
int main(int argc, char *argv[])
{
if(argc != 3)
{
cerr << "Wrong input!" << endl;
return -1;
}
ifstream input(argv[1]); // open the file of sales transactions
ofstream output(argv[2]); // open the output file
Sales_data total; // variable to hold the running sum
if (read(input, total)) // read the first transaction
{
Sales_data trans; // variable to hold data for the next transaction
while(read(input, trans)) // read the remaining transactions
{
if(total.isbn() == trans.isbn()) // check isbns
total.combine(trans); // update the running total
else
{
print(output, total) << endl; // print the results
total = trans; // process the next book
}
}
print(output, total) << endl; // print the last transaction
}
else
{
cerr << "No data?!" << endl; // no input
}
return 0;
}
int main(int argc, char* argv[]){
if( argc < 2){
cerr << "arguments are not enough" << endl;
exit(1);
}
string fileName = argv[1];
ifstream input(fileName);
if(input){
Sales_data total;
if(read(input, total)){
Sales_data trans;
while(read(input, trans)){
if(total.isbn() == trans.isbn())
total.combine(trans);
else{
print(cout, total) << endl;
total = trans;
}
}
print(cout, total) << endl;
}else{
cerr << "No data?!" << endl;
}
}
}
int main() {
Sales_data total;
if (read(std::cin, total)) {
//double price;
//if (std::cin >> total.bookNo >> total.units_sold >> price) {
// total.revenue = total.units_sold * price;
Sales_data trans;
while (read(std::cin, trans)) {
//while (std::cin >> trans.bookNo >> trans.units_sold >> price) {
// trans.revenue = trans.units_sold * price;
if (total.isbn() == trans.isbn()) {
total.combine(trans);
} else {
print(std::cout, total) << std::endl;
//std::cout << total.bookNo << " "
// << total.units_sold << " "
// << total.revenue << std::endl;
total = trans; // Use default copy constructor
}
}
print(std::cout, total) << std::endl;
//std::cout << total.bookNo << " "
// << total.units_sold << " "
// << total.revenue << std::endl;
} else {
std::cerr << "No data!" << std::endl;
return -1;
}
return 0;
}
Sales_data
add(const Sales_data &lhs, const Sales_data &rhs)
{
Sales_data sum = lhs; // copy data members from lhs into sum
sum.combine(rhs); // add data members from rhs into sum
return sum;
}
int main(){
Sales_data total;
if(read(cin,total)){
Sales_data trans;
while(read(cin,trans)){
if(total.isbn() == trans.isbn()){
total.combine(trans);
}else{
print(cout,total) << endl;
total = trans;
}
}
print(cout,total) << endl;
}else{
cerr << "No data ?! " << endl;
}
}
int main()
{
Sales_data total; // variable to hold the running sum
if (read(cin, total))
{ // read the first transaction
Sales_data trans; // variable to hold data for the next transaction
while(read(cin, trans)) // read the remaining transactions
{
if (total.isbn() == trans.isbn()) // check the isbns
{
total.combine(trans); // update the running total
}
else
{
print(cout, total) << endl; // print the results
total = trans; // process the next book
}
}
print(cout, total) << endl; // print the last transaction
}
else
{ // there was no input
cerr << "No data?!" << endl; // notify the user
}
return 0;
}
int main(int argc, char const *argv[])
{
Sales_data total;
if(read(std::cin, total))
{
Sales_data trans;
while(read(std::cin, trans))
{
if(total.bookNo == trans.bookNo)
{
total.combine(trans);
}
else
{
print(std::cout, total) << std::endl;
total = trans;
}
}
print(std::cout, total) << std::endl;
}
else
{
std::cerr << "No data" << std::endl;
}
return 0;
}
int main(int argc, char **argv)
{
ifstream input(argv[1]);
ofstream output(argv[2], ofstream::app);
Sales_data total;
if (read(input, total))
{
Sales_data trans;
while (read(input, trans))
{
if (total.isbn() == trans.isbn())
total.combine(trans);
else
{
print(output, total) << endl;
total = trans;
}
}
print(output, total) << endl;
}
else
{
cerr << "No data?!" << endl;
}
return 0;
}
int main(int argc, char * argv[])
{
Sales_data just_isbn_book("123456789-D"); //test usage of partial constructor.OK it compiles
print(cout , just_isbn_book) ; cout << endl;
Sales_data full_book("123456789-F", 3, 38.8, "Effective C++"); //test usage of full constructor.OK it compiles
print(cout , full_book) ; cout << endl;
cout << "\tAfter testing the 2 constructors, we read form the file supplied in the command line " << endl;
if(argc == 1) //input file name passed with redirection < filename
{
Sales_data total(cin); //using the constructor for initialization: reading input e.g. from a file, or from console
if( !total.isbn().empty() )
{
Sales_data trans; // variable to hold data for the next transaction
while( read(cin, trans) )
{
if ( total.isbn() == trans.isbn() ) total.combine(trans);
else
{
print(cout , total ) ; cout<<endl;
total = trans ;
}
}
print( cout, total ) ; cout<<endl;
}
else std::cerr << "No data?!" << endl;
}
else if (argc == 2) // input file passed as command line arg
{
ifstream input_file(argv[1]);
Sales_data total;
if (read(input_file, total))
{ // read the first transaction
Sales_data trans; // variable to hold data for the next transaction
while(read(input_file, trans))
{ // read the remaining transactions
if (total.isbn() == trans.isbn()) // check isbn s
total.combine(trans); // update the running total
else
{
print(cout, total) << endl; // print the results
total = trans; // process the next book
}
}
print(cout, total) << endl; // print the last transaction
} else // there was no input
cerr << "No data?!" << endl;
}
return 0;
}
int main(){
Sales_data total;
if(cin >> total.bookNo >> total.units_sold >> total.revenue){
Sales_data trans;
while(cin >> trans.bookNo >> trans.units_sold >> trans.revenue){
if(trans.isbn() == total.isbn()){
total.combine(trans);
}else{
cout << total.bookNo << " " << total.units_sold
<< " " << total.revenue << endl;
total = trans;
}
}
cout << total.bookNo << " " << total.units_sold << " " << total.revenue << endl;
}else{
int main()
{
Sales_data total;
if(read(cin, total)){
Sales_data trans;
while(read(cin, trans)){
if(total.isbn()== trans.isbn())
total.combine(trans);
else{
print(cout, total)<<endl;
total= trans;
}
}
print(cout, total)<<endl;
}
else{
std::cerr<<"No data!" <<endl;
return -1;
}
return 0;
}
void ReportForSalesData8_08(const std::string& filein, const std::string& fileout)
{
std::ifstream ifs(filein);
if (!ifs)
{
std::cerr << "open file \"" << filein << "\" error." << std::endl;
}
std::ofstream ofs(fileout, std::ofstream::app);
if (!ofs)
{
std::cerr << "open file \"" << fileout << "\" error." << std::endl;
}
Sales_data total;
if (read(ifs, total)) //输入为文件流ifs
{
Sales_data trans;
while (read(ifs, trans))
{
if (total.isbn() == trans.isbn())
{
total.combine(trans);
}
else
{
print(ofs, total) << std::endl; //输出到一个文件ofs流
total = trans;
}
}
print(ofs, total) << std::endl;
}
else
{
std::cerr << "No data." << std::endl;
}
ifs.close();
}
int main(int argc, char *argv[]) {
ifstream ifst(argv[1]);
ofstream ofst(argv[2], ofstream::app);
Sales_data total;
if (read(ifst, total)) {
Sales_data trans;
while (read(ifst, trans)) {
if (total.isbn() == trans.isbn()) {
total.combine(trans);
}
else {
print(ofst, total) << endl;
total = trans;
}
}
print(ofst, total) << endl;
}
else {
std::cerr << "No Data?!" << endl;
}
return 0;
}
int main()
{
Sales_data total;
if (read(cin, total)) {
Sales_data trans;
while (read(cin, trans)) {
if (total.isbn() == trans.isbn())
total.combine(trans);
else {
print(cout, total) << endl;
total.bookNo = trans.bookNo;
total.units_sold = trans.units_sold;
total.revenue = trans.revenue;
}
}
print(cout, total) << endl;
} else {
cerr << "No data?!" << endl;
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
if (argc != 2) {
cerr << "Usage: \"Exercise 8.6\" filename" << endl;
return 0;
}
ofstream output(argv[1], ofstream::app);
Sales_data total;
if (read(cin, total)) {
Sales_data trans;
while (read(cin, trans)) {
if (total.isbn() == trans.isbn())
total.combine(trans);
else {
print(output, total) << endl;
total = trans;
}
}
print(output, total) << endl; // print the last transaction
} else
cerr << "No data?!" << endl;
return 0;
}
Sales_data add(const Sales_data &book1, const Sales_data &book2)
{
Sales_data temp = book1;
temp.combine(book2);
return temp;
}
Sales_data add(const Sales_data &lhs, const Sales_data &rhs) {
Sales_data sum = lhs; // Use default copy constructor
sum.combine(rhs);
return sum;
}
Sales_data add(const Sales_data &lhs, const Sales_data &rhs)
{
Sales_data total = lhs;
total.combine(rhs);
return total;
}