c++ - 我的程序中出现访问冲突（分段错误）？

Question

这个程序让我非常头疼。无论出于何种原因，它一旦到达“学生 3”就会崩溃。我找不到任何它陷入的无限循环或任何其他导致它在那时崩溃的原因。非常感谢任何帮助。

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

int main()
{
 const int ARRAY_SIZE = 5;
 const int ARRAY_SIZE_TWO = 4;
 const int ARRAY_SIZE_THREE = 20;
 string names[ARRAY_SIZE];
 double grades[ARRAY_SIZE];
 double average[ARRAY_SIZE];
 double averageFinal[ARRAY_SIZE];
 string letter[ARRAY_SIZE] = {"A", "B", "C", "D", "F"};
 string studentLetter[ARRAY_SIZE]; 
 int counterOne = 0;
 int counterTwo = 0;
 int counterThree = 0;
 double temp;
 while (counterOne < ARRAY_SIZE)
 {
  system("CLS");
  cout<<"Enter the name of student number " <<(counterOne + 1) <<":"<<endl;
  cin>>names[counterOne];
  while(counterTwo < ARRAY_SIZE_TWO)
  {
   system("CLS");
   cout<<"Enter the test scores for " <<names[counterOne] <<":" <<endl;
   cout<<"Enter test score number " <<(counterTwo + 1) <<" for " <<names[counterOne] <<":" <<endl;
   cin>>grades[counterThree];
   counterTwo += 1;
   counterThree += 1;
   average[counterOne] += grades[counterThree];
  }
  counterTwo = 0;
  counterOne += 1;
 }
 counterOne = 0;
 counterTwo = 0;
 counterThree = 0;
 while(counterOne < ARRAY_SIZE)
 {
  averageFinal[counterOne] = average[counterOne] / 12;
  if (averageFinal[counterOne] < 89)
  {
   studentLetter[counterOne] = letter[0];
  }
  else if (averageFinal[counterOne] < 79)
  {
   studentLetter[counterOne] = letter[1];
  }
  else if (averageFinal[counterOne] < 69)
  {
   studentLetter[counterOne] = letter[2];
  }
  else if (averageFinal[counterOne] < 59)
  {
   studentLetter[counterOne] = letter[3];
  }
  else
  {
   studentLetter[counterOne] = letter[4];
  }
  counterOne += 1;
 }

 while(counterTwo < ARRAY_SIZE)
 {
  cout<<names[counterTwo] <<":" <<endl <<"Average: " <<averageFinal <<"%" <<endl <<"Letter Grade: " <<studentLetter[counterTwo] <<endl;
  counterTwo += 1;
 }
 system("PAUSE");
 return 0;
}

Answer 1

正如 vidit 指出的那样，counterThree 允许在读取循环中溢出 ARRAY_SIZE。您需要重新设置它，或稍后使用不同的计数器。一个好的做法是尽可能缩小变量的范围，而不是重复使用变量（避免“临时”），这可能会导致簿记混乱。