?? elmhes.cpp
字號(hào):
void elmhes(double a[6][6],int n)
{
int m,j,i;
double x,y;
if (n > 2)
{
for (m = 2 ; m<=n - 1; m++)
{
x = 0.0;
i = m;
for (j = m; j<= n; j++)
{
if ((fabs(a[j][m - 1])) > fabs(x))
{
x = a[j][m - 1];
i = j;
}
}
if (i != m)
{
for (j = m - 1; j<=n; j++)
{
y = a[i][j];
a[i][j] = a[m][j];
a[m][j] = y;
}
for (j = 1; j<= n; j++)
{
y = a[j][i];
a[j][i] = a[j][m];
a[j][m] = y;
}
}
if (x != 0.0)
{
for (i = m + 1; i<=n; i++)
{
y = a[i][m - 1];
if (y != 0.0)
{
y = y / x;
a[i][m - 1] = y;
for (j = m; j<=n; j++)
{
a[i][j] = a[i][j] - y * a[m][j];
}
for (j = 1; j<=n; j++)
{
a[j][m] = a[j][m] + y * a[j][i];
}
}
}
}
}
}
}
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