Question

How to implement a function to get vector length in C++

Answer 1

#include <iostream>
#include <vector>

size_t GetVectorSize(std::vector<int> &v) {
    size_t i = 0;
    for (const auto &item : v) {
         i++;
    }
    return i;
}

int main() {
    std::vector<int> v { 1, 4, 8, 7, 0, 3 };

    std::cout << GetVectorSize(v);

    return 0;
}
    
    
    
    
/*
run:
  
6
     
*/

 

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