如何返回矩阵? [英] How to return matrix?
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问题描述
我正在尝试进行Cramer线性求解,我写了一个函数来替换矩阵列,就像这样:
I'm trying to make a Cramer-linear-solving, and I wrote a function that replaces a matrix column, just like that:
void replacecol(int c, int n, float mat_in[n][n], float vect_in[n],
float mat_out[n][n])
{
int i, j;
for (i = 0; i < n; i++)
{
for (j = 0; j < n; j++)
{
if (j == c)
{
mat_out[i][j] = vect_in[j];
}
else
{
mat_out[i][j] = mat_in[i][j];
}
}
}
}
但是它目前是空的,当我调用此函数时,我希望它返回其值为mat_out的值...我该怎么做??
But it is currently void, and I want it to return the mat_out with it's values, when I call this function... How could I do that??
推荐答案
您可以避免对函数使用2个矩阵.您可以简单地:
You can avoid to use 2 matrices for your function. You can simply:
void replacecol(int c, int n, float mat_in[n][n], float vect_in[n]))
{
int i;
for (i = 0; i < n; i++)
{
mat_in[i][c] = vect_in[i];
}
}
float mat_in[n][c]
它是指针float(*)[]
,因此可以在传递的矩阵上对该参数进行修改.
float mat_in[n][c]
it is a pointer float(*)[]
so modifications on that parameter are made on the passed matrix.
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