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C++ Vector assign()This function assigns new values to the vector and replacing the old ones. SyntaxConsider a vector v to whom the value is to be assigned. Syntax would be : v.assign(first,last); v.assign(n,val); Parameter(first,last) :It defines the range.first is an input iterator pointing to the first element and last is an input iterator refering to the past the last element. n : Number of times the value to be occurred. val : It defines the value which is to be assigned. Return valueIt does not return any value. Example 1Let's see a simple example. #include<iostream> #include<vector> using namespace std; int main() { vector<int> v{1,2,3,4,5}; vector<int> v1; v1.assign(v.begin()+1,v.end()-1); for(int i=0;i<v1.size();i++) std::cout<<v1[i] <<std::endl; return 0; } Output: 2 3 4 In this example, vector v containing integer values is assigned to the vector v1 using assign() function. Example 2Let's see a another simple example. #include<iostream> #include<vector> using namespace std; int main() { vector<char> v; v.assign(5,'C'); for(int i=0;i<v.size();i++) std::cout<< v[i] << " "; return 0; } Output: C CCCC In this example, v is assigned value 'C' five times using assign() function. Example 3Let's see a simple example. #include<iostream> #include<vector> using namespace std; int main() { vector<char> v{'C','+','+'}; vector<char> v1; v1.assign(v.begin(),v.end()); for(int i=0;i<v.size();i++) std::cout<< v[i]; return 0; } Output: C++ In this example, vector v containing character values is assigned to the vector v1 using assign() function.
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