1.C++.基于范围的for循环

---

Form:

for(element:list){  // list is a ptr to a list/vector.
    // loop body
}

For example:

int numbers[] = {1,2,3,4,5,6,};
for(auto number:numbers){   // "auto" means that the compiler will infer the type of "numbers".
    cout<<number<<' ';
}

The result of running the code is:1 2 3 4 5 6 .

The codes above is equivalent to:

for(int i = 0;i < sizeof(numbers);i ++){
    cout<<numbers[i]<<' ';
}

---