/C++/How to allocate memory for vector c++

How to allocate memory for vector c++

std::vector<int> vec1;
vec1.reserve(30);  // Allocate space for 30 items, but vec1 is still empty.

std::vector<int> vec2;
vec2.resize(30);  // Allocate space for 30 items, and vec2 now contains 30 items.

Source: stackoverflow.com

Similar codes

93 votes503 views4 answers
C++ get time
C++
7 votes323 views1 answer
Migration meaning
C++
2 votes314 views2 answers
C++ output
C++
0 vote303 views1 answer
Vector stop at newline
C++
0 vote308 views1 answer
The iostream is the head er file which contains all the functions of program like cout, cin and etc.
C++
7 votes314 views1 answer
How to check string contains char in c++
C++
0 vote303 views1 answer
C++ konsolenausgabe
C++
0 vote392 views3 answers
Simplest code for stack implementation in c++
C++
0 vote326 views1 answer
PI IN C++ WITH CMATH
C++
0 vote332 views1 answer
Ascii allowed in c++
C++