设置一个新的独立变量的变化在C所有其他变量 [英] setting a new independent variable changes all the other variables in c
本文介绍了设置一个新的独立变量的变化在C所有其他变量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我真的不知道哪个称谓更适合的来形容我的问题。我通过VirtualBox的使用Linux。我使用的是gcc编译器。我一直在写我的code到现在为止（300线），而类似的问题。突然，如果我把一个新的变量，并设置一个值，在我的$ C $其他变量C更改它们的值。
我想知道如果我要清理内存什么的。
做
{
rand_arr = rpermute（dim_x * dim_y）;
标志= 0; 对于（t = 0; T＆LT;（dim_x * dim_y）;吨++）
{
X = rand_arr [T] / dim_x;
Y = rand_arr [T]％dim_x; 如果（ARR [X] [Y] == 255）
{
current_distance = SQRT（POW（退出[0] [0] - 的x，2）+ POW（退出[0] [1] - Y，2））; 如果（！X = 0＆放大器;＆安培;！常用3 [X - 1] [Y] = 254）
{
distance_up = SQRT（POW（退出[0] [0] - （X - 1），2）+ POW（退出[0] [1] - Y，2））;
}
其他
{
distance_up = MAX_DISTANCE +千万;
} //这里有一个code计算类似的数学运算为
// current_distance和distance_up min_dist [0] = distance_up;
min_dist [1] = distance_back; //这里我继续在min_dist阵列中的所有变量设置
//这里有一个冒泡code安排min_dist阵列 K = 0;
做
{
如果（distance_up == min_dist [K]放大器;＆安培;常用3 [X - 1] [Y] == 0安培;＆安培; distance_up＆LT; current_distance）
{
ARR [X - 1] [Y] = 255;
ARR [X] [Y] = 0;
标志= 1;
打破;
}
否则，如果（distance_back == min_dist [K]放大器;＆安培;常用3 [X] [Y - 1] == 0安培;＆安培; distance_back＆LT; current_distance）
{
ARR [X] [Y - 1] = 255;
ARR [X] [Y] = 0;
标志= 1;
打破;
} //这里有一个code如果用类似上述两种说法 ķ++;
}而（K＆4;放大器;＆放大器; min_dist [k]的＆下; current_distance）;
}
}
...
}而（...）
所以这个循环之前，每一个变量保持不变，但如果我只设置一个新的变量，例如 INT测试= 0; ，在这个循环中每个变量的变化，尽管的事实，新的变量是独立的。
我也使用的malloc 在函数;我不知道如果这是问题，但我没有任何问题，到现在。
解决方案
的#include＆LT;＆ASSERT.H GT; / *＆LT;＆LT; - 在这里* /做
{
rand_arr = rpermute（dim_x * dim_y）;
标志= 0; 对于（t = 0; T＆LT;（dim_x * dim_y）;吨++）
{
X = rand_arr [T] / dim_x;
Y = rand_arr [T]％dim_x; 如果（ARR [X] [Y] == 255）
{
current_distance = SQRT（POW（退出[0] [0] - 的x，2）+ POW（退出[0] [1] - Y，2））; 如果（！X = 0＆放大器;＆安培;！常用3 [X - 1] [Y] = 254）
{
distance_up = SQRT（POW（退出[0] [0] - （X - 1），2）+ POW（退出[0] [1] - Y，2））;
}
其他
{
distance_up = MAX_DISTANCE +千万;
} //这里有一个code计算类似的数学运算为
// current_distance和distance_up min_dist [0] = distance_up;
min_dist [1] = distance_back; //这里我继续在min_dist阵列中的所有变量设置
//这里有一个冒泡code安排min_dist阵列 K = 0;
做
{
如果（distance_up == min_dist [K]放大器;＆安培;常用3 [X - 1] [Y] == 0安培;＆安培; distance_up＆LT; current_distance）
{
断言（X 0）; //＆LT;＆LT; - 在这里
ARR [X - 1] [Y] = 255;
ARR [X] [Y] = 0;
标志= 1;
打破;
}
否则，如果（distance_back == min_dist [K]放大器;＆安培;常用3 [X] [Y - 1] == 0安培;＆安培; distance_back＆LT; current_distance）
{
断言（γ大于0）; //＆LT;＆LT; ---在这里，
ARR [X] [Y - 1] = 255;
ARR [X] [Y] = 0;
标志= 1;
打破;
} //这里有一个code如果用类似上述两种说法 ķ++;
}而（K＆4;放大器;＆放大器; min_dist [k]的＆下; current_distance）;
}
}
...
}而（1）; //＆LT;＆LT; - 在这里
I really don't know which title fits better to describe my problem. I'm using Linux through VirtualBox. I'm using the gcc compiler. I have been writing my code up until now (300 lines) without a similar problem. Suddenly, if I put a new variable and set a value, the other variables in my code change their values. I am wondering if I have to clean a memory or something.
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 (...)
So every variable before this loop remains the same, but if I just set a new variable, for example int test=0;, every variable changes in this loop despite the fact that the new variable is independent.
I am also using malloc in a function; I wonder if this is the problem but I didn't have any problem till now.
解决方案
#include <assert.h> /* <<-- 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
这篇关于设置一个新的独立变量的变化在C所有其他变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
