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Class SimpleTimer

The following code should be placed in a file SimpleTimer.cpp. The file should be in the same folder as the source file containing main function. The class SimpleTimer can be used if the directive #include "SimpleTimer.cpp" is placed in the source just below #include<iostream>.

// SimpleTimer.cpp // place in the same folder as nonParallelFunction.cpp and parallelFunction.cpp #include<chrono> class SimpleTimer{ private: int64_t timerStart; int64_t timerEnd; int64_t timerInProgress; public: SimpleTimer(const int64_t & =0); void start(); void end(); double getTime(); }; SimpleTimer::SimpleTimer(const int64_t & _inProgress){ timerInProgress=_inProgress; if(timerInProgress==1){ timerStart=std::chrono::high_resolution_clock::now().time_since_epoch().count(); } } void SimpleTimer::start(){ timerInProgress=1; timerStart=std::chrono::high_resolution_clock::now().time_since_epoch().count(); } void SimpleTimer::end(){ timerInProgress=2; timerEnd=std::chrono::high_resolution_clock::now().time_since_epoch().count(); } double SimpleTimer::getTime(){ if(timerInProgress!=2){ return -1.0; } double fR= double(timerEnd)-double(timerStart); fR/= 1000000000.0; return fR; }

This is how the class can be used to test the speed of a function or a block of code:

SimpleTimer tm;
tm.begin();
//Block of code 
//whose speed we want to test
tm.end();
std::cout << "The time it took to execute the block is: ";
std::cout << tm.getTime() << "\n";