A C++ fraction class which may enable you to use fraction in you C++ program.
New: fraction class is now header-only, just #inclued "fraction.hpp". Then, you can create a fraction and then use them like regular numbers.
#include <iostream>
#include "fraction.hpp"
int main() {
using frac = fraction<int>;
std::cout << frac("1/3") + frac(1,4) * frac(1,2);
frac a, b(1,2), c("3/4");
std::cin >> a;
std::cout << a + b;
std::cout << c * b;
}For more demonstration, please refer to demo.cpp.
Legacy: In this way, you may need to compile fraction.cpp and your program in the first place, then link it against your program, and finally execute the executable file.
You can use #inclued "fraction.h" in your code:
#include <iostream>
#inclued "fraction.h"
int main() {
fration a, b(1,2), c(3,4);
std::cin >> a;
std::cout << a + b;
c *= b;
std::cout << c;
}Then you may compile and link manually in terminal.
g++ -c fraction.cpp
g++ -c demo.cpp
g++ -o main fraction.o demo.o
./mainor you may do the compiling & linking stuff in one command:
g++ fraction.cpp demo.cpp -o main
./main2020/08/10 update: Now it uses std::string to receive user's keyboard input and process with relative functions.
2021/03/19 update: Now fraction is a template class and header-only.