c ++数组结构问题

Question

Anyone here know C++ or programming in general

I need help with this program. I made a structure, and an array out of that structure. When I try entering a name as a string, an infinite loop ensures. What is the problem?

    #include <iostream>
    #include <string>

    const int size = 12;

    struct soccer
    {
        std::string name;
    float points, jersey;   
};


void input(soccer []);

int main()
{
    soccer info[size];
    float total;

    input(info);
}

void input(soccer info [])
{
    for (int i = 0 ; i < size ; i++)
    {
        std::cout << "Enter the name of soccer player #" << i+1 << ": ";
        std::cin >> info[i].name;
        std::cout << "Enter the jersey number for this player:";
        std::cin >> info[i].jersey;
        while (info[i].jersey < 0)
        {
            std::cout << "The jersey number cannot be a negative number. Please enter a value number for jersey: ";
            std::cin >> info[i].jersey;
        }
        std::cout << "Enter the number of points scored by this player: ";
        std::cin >> info[i].points;
        while (info[i].points < 0)
        {       
            std::cout << "Points scored cannot be a negative number. Please enter a valid number for points: ";
            std::cin >> info[i].points;
        }
    }
}

Answer 1

It seems that you are entering more than one word in data member name using operator >> . Either enter only one word or use standard function std::getline( std::cin, name ) instead of the operator >> . Do not forget to use member function ignore before using std::getline that to remove the new line character from the stream buffer after entering points.

For example

#include <limits>

//...

std::cin.ignore( std::numeric_limits<std::streamsize>::max(), '\n' ); 
std::getline( std::cin, info[i].name );

Another approach is to use operator >> as before but to add one more operator that to enter first name and last name. Then you could simply concatenate these two names.

std::string first_name;
std::string last_name;

//...

std::cout << "Enter the first name of soccer player #" << i+1 << ": ";
std::cin >> first_name;

std::cout << "Enter the last name of soccer player #" << i+1 << ": ";
std::cin >> last_name;

info[i].name = first_name + " " + last_name;