LinuxQuestions.org - System uptime

Hello,

I have a hw assignment to obtain the system totaltime and idletime, perform a calculation, obtain totaltime and uptime again, and calculate the percentage of time that the cpu was busy during that time.

I know how to obtain the uptime and it is a file of the totaltime and idletime, but I don't know how to store those seperately. So far my prog looks like this:

Code:

#include <iostream>

#include <fstream>

using namespace std;



void work()

{

double y;

double x=12340;

double z=98760;

for(long j=0;j<100000;j++)

{

for(long j=0;j<100000;j++)

{

y=x*z;

}

}

}



int main()

{

cout << "\nTotaltime and Idletime:\n" << endl;

system("cat /proc/uptime");

work();

cout << "\nTotaltime and Idletime:\n" << endl;

system("cat /proc/uptime");

return 0;

//HERE IS WHERE I WILL PERFORM CALCS

}

I need to store the 4 times and then perform the calculations. How do I store the times?

thanks
j