c-resources/CPlusPlus20ForProgrammers-m.../examples/ch19/fig19_18.cpp

48 lines
2.1 KiB
C++

// fig19_18.cpp
// flags member function.
#include <format>
#include <iostream>
int main() {
int integerValue{1000};
double doubleValue{0.0947628};
// display flags value, int and double values (original format)
std::cout << std::format("flags value: {}\n", std::cout.flags())
<< "int and double in original format:\n"
<< integerValue << '\t' << doubleValue << "\n\n";
// save original format, then change the format
auto originalFormat{std::cout.flags()};
std::cout << std::showbase << std::oct << std::scientific;
// display flags value, int and double values (new format)
std::cout << std::format("flags value: {}\n", std::cout.flags())
<< "int and double in new format:\n"
<< integerValue << '\t' << doubleValue << "\n\n";
std::cout.flags(originalFormat); // restore format
// display flags value, int and double values (original format)
std::cout << std::format("flags value: {}\n", std::cout.flags())
<< "int and double in original format:\n"
<< integerValue << '\t' << doubleValue << "\n";
}
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