C++ Vector resize
It adjusts the size of the vector to the designated value.
Size changed to 4 and new value is
Syntax
Consider a vector v. Syntax would be:
Example
v.resize(n,val);
Parameter
n : It is the new vector size.
If n exceeds the current size of the vector, the value of val will be inserted into the newly added space.
Return value
It does not return any value.
Example 1
Let's consider a basic scenario where n is smaller than the current size of the vector.
Example
#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<int> v;
for(int i=1;i<=10;i++)
{
v.push_back(i);
}
cout<<"Initial elements are :";
for(int i=0;i<v.size();i++)
cout<<v[i]<<" ";
v.resize(5);
cout<<'\n';
cout<<"After resizing its size to 5,elements are :";
for(int i=0;i<v.size();i++)
cout<<v[i]<<" ";
return 0;
}
Output:
Output
Initial elements are: 1 2 3 4 5 6 7 8 9 10
After resizing its size to 5, elementsare: 1 2 3 4 5
Example 2
Let's consider a basic scenario where n exceeds the current size of the vector.
Example
#include<iostream>
#include<vector>
using namespace std;
int main()
{
vector<string> v1{"java","C","C++"};
cout<<"Elements of v1 are :";
for(int i=0;i<v1.size();i++)
cout<<v1[i]<<" ";
v1.resize(5,".Net");
for(int i=0;i<v1.size();i++)
cout<<v1[i]<<" ";
return 0;
}
Output:
Output
Elements of v1 are :java C C++ java C C++ .Net .Net
