Using G++ to compile multiple .cpp and .h files

To compile multiple files like file_name.h, or file_name.cpp at once, we can use the files like a list one after another. The syntax will be like this −

g++ abc.h xyz.cpp

To run the program, we can use this −

./a.out

Example

float area(float r){    return (3.1415*r*r); //area of a circle } float area(float l, float w){    return (l * w); //area of a rectangle }

Example

#include <iostream> #include "area.h" using namespace std; main(){    cout << "Area of circle with radius 2.5 is: " << area(2.5) << endl;    cout << "Area of rectangle with length and width are 5 and 7 is: " << area(5, 7) << endl; }

Output

$ g++ area.h find_area.cpp $ ./a.out Area of circle with radius 2.5 is: 19.6344 Area of rectangle with length and width are 5 and 7 is: 35 $