尝试填充2d矩阵时出现分段错误（Core dumped）错误

Question

我正在尝试用随机整数填充我的2D数组。

//rows, cols are randomly generated ints between 1 and 10
int rows = rand()%10 +1;
int cols = rand()%10 +1;

int arr[rows][cols];
for (i = 0; i <rows; i++){
 for (j=0; i<cols; j++){
  arr[i][j] = rand()%10;
}}

每次我尝试运行此代码时，都会给我一个分段默认值。

我编辑了帖子以提供我正在运行的实际代码

Answer 1

我想这是因为i < ... j < ...中for (j=0; i<cols; j++)应该是@IBAction func faceURL(_ sender: Any) { if let facebookURL = URL(string: "https://www.facebook.com") { UIApplication.shared.openURL(facebookURL) // the open method you were using doesn't exist in Swift } } ;