Is it possible to do multiple operations in increm

问题:

Is it possible to do multiple operations in increment part of for loop in C/C++? Something like this:

int a = 0, b = 0, c = 5;
for(; a < c; increase a by 1 and increase b by 2)

回答1:

Use the comma operator:

for (; a < c; ++a, b += 2)

回答2:

Yes it is possible. You can also declare multiple variables inside the loop and don't need to do it before.

for (int a = 0, b = 0, c = 5; a < c; ++a, b += 2)