"Studious C + + 2nd Edition", chapter 2nd skill for statement

for (initialize; condition; increment) {...} It: initialization and increment can put any statement including the statement block, the condition needs to be able to determine the true and False value

C++0X provides a new version for keyword (dependent on arrays and containers, followed by introduction)

The variable declared in the initialization statement is scoped only within the loop, and its value does not affect the variable with the same name outside the loop body. If you want to be outside the loop, place the declaration before the for.

The for continue executes an increment statement before executing the next loop's conditional statement.

"Studious C + + 2nd Edition", chapter 2nd skill for statement