Need to introduce headers #include <the Vector> before you can use
Initialize a one-dimensional vector
. 1 Vector < int > V; // defaults to an empty 2 Vector < int > V1 (V); // Use the initialization vector v V1 . 3 Vector < int > V2 (v.begin (), v.end ()); / / use v interval [begin, end] initialization v1, customizable interval . 4 Vector < int > V3 (v.begin () + . 1 , v.begin () + . 3 ); // with the interval [begin + 1, begin + 3) to the second third initialization V5 . 5 Vector < int > V4 ( 15 ); // Vector initialized with the value n = 15 elements 0 . 6 Vector < int > V5 ( 15 , 10 );// Initialization n = 15 elements and the value of m = vector 10
closing the left and right vector v.end open interval () no value; V3 (v.begin () +. 1, v.begin () +. 3) is initialized when not reach b.begin () + 3, belonging to the right to open interval [1,3) comprises two data 1,2
Example:
Code:
. 1 #include <the iostream> 2 #include <Vector> . 3 the using namespace STD; . 4 void Show (Vector < int > & V) { . 5 for ( int I = 0 ; I <( int ) v.size (); I ++ ) { . 6 COUT << V [I] << " " ; . 7 } . 8 COUT << endl; . 9 } 10 int main () . 11 { 12 is // Vector initialization requires include headers #include <vector> can use 13 Vector < int > V; // defaults to an empty 14 int Data, n-; 15 CIN n->>; // Representative number 16 for ( int I = 0 ; I <n-; I ++ ) { . 17 // CIN >> V [I]; // wrong, because no initialization vector v of size, can not use the V [I] 18 is CIN >> Data; . 19 v.push_back (Data); 20 is } 21 is Vector < int > V1 (V); // use initialization vector v V1 22 is Vector < int > V2 (v.begin (), v.end ()); //Interval using v [begin, end] initialization v1, customizable section 23 is Vector < int > V3 (v.begin () + . 1 , v.begin () + . 3 ); // with the interval [begin + 1, begin + 3) the second to the third initialization V5 24 Vector < int > V4 ( 15 ); // Vector initializing n = 15 elements with the value 0 25 Vector < int > V5 ( 15 , 10 ); // initializing n = 15 elements and the value of m = vector 10 of 26 is Show (V); 27 Show (V2); 28 Show (V3); 29 Show (V4); 30 Show (V5); 31 is return 0; 32 }
Input:
10 1 2 3 4 5 6 7 8 9 10
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