C to return to an empty curly braces {} represents what mean-CodePudding

The class Solution {
Public:
Vector MaxSlidingWindow (vector & Nums, int k) {
Int n=nums. The size ();
If (n * k==0) {
Return {};
}
Vector Res.
for(int i=0; iInt max_num=INT_MIN;
For (int j=I; JMax_num=Max (nums [j], max_num);
}
Res. The push_back (max_num);
}
return res;
}
};
CodePudding user response:
The return type is vector

Return {}; It is to return empty, but is null or empty vector is not clear, can verify
CodePudding user response:
Is a vector , the size is zero; NULL cannot be vector Object;
This is equivalent to construct a temporary object is used to return
CodePudding user response:
C + + new syntax, their search 11/14 new features in c + +, make up a missed lesson can seriously,
CodePudding user response:
An empty vector
CodePudding user response:
Returns an empty vector
CodePudding user response:
That is to say, when you don't meet the if condition, there is no right as a result, this time don't need to double down the for loop, the program can end, but the function return value
Vector< again; Int> (that is, the function name in front of the type), and then back {} to represent no results, returns an empty vector , like a house, the house is still there, but nothing inside, in order to facilitate understanding, if you want to return to a specific value vector And then the return value can be written as the return {1, 2, 3, 4}, this means return vector Contains 1, 2, 3, 4 these a few elements, equivalent to use these elements to create a vector< containing 1, 2, 3, 4; Int>
CodePudding user response:
refer to 6th floor y2016724 response:
that is to say, when you do not satisfy the if condition, there is no right as a result, this time don't need to double down the for loop, the program can be ended, but the function return value
Vector< again; Int> (that is, the function name in front of the type), and then back {} to represent no results, returns an empty vector , like a house, the house is still there, but nothing inside, in order to facilitate understanding, if you want to return to a specific value vector And then the return value can be written as the return {1, 2, 3, 4}, this means return vector Contains 1, 2, 3, 4 these a few elements, equivalent to use these elements to create a vector< containing 1, 2, 3, 4; Int>

Understand, thank you
CodePudding user response:
How to call??

reference xiaoxiang patter ~ 7 floor response:

Quote: refer to the sixth floor y2016724 response:

That is to say, when you don't meet the if condition, there is no right as a result, this time don't need to double down the for loop, the program can end, but the function return value
Vector< again; Int> (that is, the function name in front of the type), and then back {} to represent no results, returns an empty vector , like a house, the house is still there, but nothing inside, in order to facilitate understanding, if you want to return to a specific value vector And then the return value can be written as the return {1, 2, 3, 4}, this means return vector Contains 1, 2, 3, 4 these a few elements, equivalent to use these elements to create a vector< containing 1, 2, 3, 4; Int>

Thank you know that