将字符串2d数组传递给函数

Question

I am passing string 2d array to a function in a following way. Is it correct or can it be done better ?

#include<iostream>
#include<string>
using namespace std;

void print_name(string name[])
{
    cout<<name[0];
}

int main()
{
    string name[4];
    name[0] = "abc";
    name[1] ="xyz";
    name[2] = "pqr";
    name[3]= "xyq";

    print_name(name);
    return 0;
}

Answer 1

In C++ a better way is to pass a std::vector as the parameter.

void print_name(const std::vector<std::string>& name)

and

std::vector<std::string> name{"abc", "xyz","pqr","xyq"};

print_name(name);

Answer 2

The problem with passing C-style arrays is that the function that you call does not know where it ends. If you must use a fixed-size array, a better approach would be to pass std::array<std::string,4> :

void print_name(std::array<std::string,4>& names) ...

If using std::vector<std::string> is acceptable, it would give your code more flexibility:

void print_name(std::vector<std::string>& names) ...

If none of the above works for you, consider passing the number of array items along with the array, so that your print_name knows how may items it gets:

void print_name(std::string names[], int count) ...