How to have matlab tic toc in C++?

Reprinted form: https://stackoverflow.com/questions/13485266/how-to-have-matlab-tic-toc-in-c/13485583#13485583

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in matlab:

tic
do something ...
toc

How I can do this in C++?

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I'd implement it as a stack. Then, you can recurse, call it multiple times, do whatever you want, and it won't break, so long as you call toc() after every tic(). As a bonus, you don't have to resort to using macros: 

#include <iostream>
#include <stack>
#include <ctime>

std::stack<clock_t> tictoc_stack;

void tic() {
    tictoc_stack.push(clock());
}

void toc() {
    std::cout << "Time elapsed: "
              << ((double)(clock() - tictoc_stack.top())) / CLOCKS_PER_SEC
              << std::endl;
    tictoc_stack.pop();
}

int main(int argc, char *argv[]) {
    tic();
    doSomething();
    toc();
    return 0;
}