Question

#include "Cell.h"
#include <iostream>

using namespace std;

void Cell::CreateArea(int x[][100], int y[][100], int f, int c, int tc){
int f1, c1;
for (int i = -1; i <= f; i++){
    for (int j = -1; j <= c; j++){
        x[i][j] = 0;
        y[i][j] = 0;
    }
}
//Copy(y,x,f,c); //copy the matrix of zeros in another temporary array
while (tc){
    bool re = true;
    while (re){
        f1 = rand() % f;
        c1 = rand() % f;
        if (x[f1][c1] == 0)
        {
            x[f1][c1] = 1; //enter random cells in random positions that are not repeated
            re = false;
        }
    }
    tc--; //decreases the umber of cells to be entered
  }
}

void Cell::PrintArea(int x[][100], int f, int c){
for (int i = 0; i<f; i++){
    for (int j = 0; j<c; j++){
        if (x[i][j] == 1) cout << '*'; //Prints a "*" if cells are alive 
        else cout << '.'; //Prints a "." if cells are dead 
    }
    cout << endl;
  }
}

int Cell::Population(int x[][100], int f, int c){
int counter = 0;
for (int i = 0; i<f; i++)
for (int j = 0; j<c; j++)
if (x[i][j] == 1)counter++;
return counter;

}

当我运行此代码时，它可以工作，但在它执行后它崩溃给我错误： C ++ AssignmentPart1.exe中0x00D64674处的未处理异常：0xC0000005：访问冲突写入位置0xFFFFFE88。

有人知道为什么请吗？你已经在这几个小时！

Answer 1

数组从0转到n-1，因此CreateArea循环不正确：

for (int i = -1; i <= f; i++){
    for (int j = -1; j <= c; j++){

-1不是有效的数组索引！你必须从0到f或c。如果它们从零开始，很可能排除f和c（人们经常做的数组索引从0到99）：

for (int i = 0; i < f; i++){
    for (int j = 0; j < c; j++){

同时检查功能开始时f和c是否低于100！然后，你确定你永远不会写出数组边界......

0x00D64674处的未处理异常

1 个答案: