C++11 range-based for loops without loop variable

Question

In C++ I need to iterate a certain number of times, but I don\'t need an iteration variable. For example:

for( int x=0; x<10; ++x ) {
    /* code goes her         


        

Answer 1

You could use the STL together with a lambda expression.

#include 
#include 

int main() {
    int a[] = {1,2,3,4,5,6};

    std::for_each(std::begin(a),
            std::end(a),
            [](int){std::cout << "Don't care" << std::endl;});
}

This approach also works for arbitrary containers such as vectors or lists. Let vector a, then you'd call a.begin() and a.end(). Note that you can also use a function pointer instead of a lambda expression.

The above preserves your notion of using a foreach, while not complaining about an unused parameter.