How to invoke operating system command from a C/C++ program.

There can be situations in where we need to excute a linux commands from a C++ program.

Then system() is the function you need.

It is simple, only the command has to be passed and it will return 0 if command successfuly executed, 1 otherwise.

syntax: int system(const char *command);

As system function is declared in stdlib.h, it can be considered a C function. But in C++, stdlib.h is merged into the std namespace and is located in the cstdlib .

	#include <cstdlib>
	#include <iostream>
	using namespace std;
	int main()
	{
	int returnCode = system("nm -C -S -n mylib.so > libSymbols.log");
	if (returnCode == 0) {
	cout << "Command executed successfully." << endl;
	}
	else {
	cout << "Command execution failed" << returnCode << endl;
	}
	return 0;
	}

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