设置一个新的自变量会改变c中的所有其他变量
我真的不知道哪个标题更适合描述我的问题。 我通过VirtualBox使用Linux。 我正在使用gcc编译器。 到目前为止，我一直在编写代码（300行），没有类似的问题。 突然间，如果我输入一个新变量并设置一个值，我代码中的其他变量就会改变它们的值。 我想知道我是否需要清理记忆或其他东西。
do { rand_arr = rpermute(dim_x * dim_y); flag = 0; for (t = 0; t < (dim_x * dim_y); t++) { x = rand_arr[t] / dim_x; y = rand_arr[t] % dim_x; if (arr[x][y] == 255) { current_distance = sqrt(pow(exit[0][0] - x, 2) + pow(exit[0][1] - y, 2)); if (x != 0 && arr[x - 1][y] != 254) { distance_up = sqrt(pow(exit[0][0] - (x - 1), 2) + pow(exit[0][1] - y, 2)); } else { distance_up = max_distance + 10000000; } // Here there is a code computing similar math operations as // current_distance and distance_up min_dist[0] = distance_up; min_dist[1] = distance_back; // Here i continue setting in the min_dist array all the variables // Here there is a bubblesort code to arrange the min_dist array k = 0; do { if (distance_up == min_dist[k] && arr[x - 1][y] == 0 && distance_up < current_distance) { arr[x - 1][y] = 255; arr[x][y] = 0; flag = 1; break; } else if (distance_back == min_dist[k] && arr[x][y - 1] == 0 && distance_back < current_distance) { arr[x][y - 1] = 255; arr[x][y] = 0; flag = 1; break; } // Here there is a code with if statements similar to the two above k++; } while (k < 4 && min_dist[k] < current_distance); } } ... } while (...) 所以这个循环之前的每个变量都保持不变，但是如果我只是设置一个新变量，例如int test=0; 尽管新变量是独立的，但每个变量在这个循环中都会发生变化。 我也在函数中使用malloc ; 我想知道这是不是问题，但到目前为止我没有任何问题。
#include /* <<-- Here */ do { rand_arr = rpermute(dim_x * dim_y); flag = 0; for (t = 0; t < (dim_x * dim_y); t++) { x = rand_arr[t] / dim_x; y = rand_arr[t] % dim_x; if (arr[x][y] == 255) { current_distance = sqrt(pow(exit[0][0] - x, 2) + pow(exit[0][1] - y, 2)); if (x != 0 && arr[x - 1][y] != 254) { distance_up = sqrt(pow(exit[0][0] - (x - 1), 2) + pow(exit[0][1] - y, 2)); } else { distance_up = max_distance + 10000000; } // Here there is a code computing similar math operations as // current_distance and distance_up min_dist[0] = distance_up; min_dist[1] = distance_back; // Here i continue setting in the min_dist array all the variables // Here there is a bubblesort code to arrange the min_dist array k = 0; do { if (distance_up == min_dist[k] && arr[x - 1][y] == 0 && distance_up < current_distance) { assert (x > 0); // <<-- Here arr[x - 1][y] = 255; arr[x][y] = 0; flag = 1; break; } else if (distance_back == min_dist[k] && arr[x][y - 1] == 0 && distance_back < current_distance) { assert (y > 0); // <<--- Here arr[x][y - 1] = 255; arr[x][y] = 0; flag = 1; break; } // Here there is a code with if statements similar to the two above k++; } while (k < 4 && min_dist[k] < current_distance); } } ... } while (1); // <<-- Here