Setting a timer in C++

#include <time.h> //Need this for clock()

int main() {
    int seconds_to_micro = 1000000; //conversion from seconds to microseconds var 
    
    clock_t start = clock(); //Get starting point clock
    
    //***********PERFORM AN ACTION HERE********
    
    clock_t end = clock(); //Get ending point clock
    
    float time_in_seconds = static_cast<float>(end - start)/ CLOCKS_PER_SEC //in seconds
    float time_in_microseconds = static_cast<float>(end - start)/ CLOCKS_PER_SEC * seconds_to_micro; //in microseconds
    
    return;
}