Question

How to replace vector element by index in C++

Answer 1

#include <iostream>
#include <vector>
  
int main()
{
    std::vector<int> v = {5, 7, 8, 1, 7, 4, 9, 0};
    
    
    v.at(3) = 1000;
    
    for (int i = 0; i < v.size(); i++) {
        std::cout << v[i] <<  " ";
    }
      
    return 0;
}
    
    
    
    
/*
run:
    
5 7 8 1000 7 4 9 0  
    
*/

 

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