Question

我想从文件中提取数据并将它们存储到myWorld中，但我的for循环不起作用，程序一旦进入for循环就不会循环一次。我不确定问题是什么。到目前为止，这是我的代码。

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

struct Country 
 {
  double pop1950;
  double pop1970;
  double pop1990;
  double pop2010;
  double pop2015;
  string name;
 };

const int MAXCOUNTRIES = 300;

struct World 
 {
  int     numCountries;
  Country countries[MAXCOUNTRIES];
 } myWorld;

void printPop ();

int main ()
{
 printPop();
 return 0;
}

void printPop()
{
 ifstream inFile("population.csv");

 if (!inFile.fail())
 {
    cout << "File has opened successfully.";
 }

 if (inFile.fail())
 {
  cout << "File has failed to open.";
  exit(1);
 }

 for (int i = 0; i < MAXCOUNTRIES; i++)
 {
    inFile >> myWorld.countries[i].pop1950 >> myWorld.countries[i].pop1970 >> myWorld.countries[i].pop1990
           >> myWorld.countries[i].pop2010 >> myWorld.countries[i].pop2015;
    getline (cin, myWorld.countries[i].name);
    cout << "loop is running" << endl;
 }

  inFile.close();
}

Answer 1

我认为你的循环正在运行，它只是在等待用户输入：

getline (cin, myWorld.countries[i].name);

将信息从文件插入结构

1 个答案: