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Views: 3601 | Replies: 2
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Join Date: Jan 2005
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Newbie Poster
Hi, I having this error and i don't know how to fix it, can anybody help please:
"declaration of `c' as multidimensional array must have bounds for all dimensions except the first", i'm getting this error because of :
<< moderator edit: added [code][/code] tags >>
"declaration of `c' as multidimensional array must have bounds for all dimensions except the first", i'm getting this error because of :
void lcs::LCS_Length(int X[], int Y[], int c[][], char b[][], int m, int n)
{
for( int i = 1; i < m; i++)
c[i][0] = 0;
for( int j = 1; j < n; j++)
c[0][j] = 0;
for( int i = 1; i < m; i++)
for( int j = 1; j < n; j++)
{
if( X[i] == Y[j])
{
c[i][j] = c[i - 1][j - 1] + 1;
b[i][j] = 'D';
}
else if(c[i - 1][j] >= c[i][j - 1])
{
c[i][j] = c[i - 1][j];
b[i][j] = 'U';
}
else
{
c[i][j] = c[i][j - 1];
b[i][j] = 'L';
}
}
}
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Join Date: Apr 2004
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I find the diagnostic message quite self-explanitory. You can't do [][]. You can do [][5], for example.
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declaration of `c' as multidimensional array must have bounds for all dimensions except the first
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Join Date: May 2005
Posts: 232
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Solved Threads: 2
Posting Whiz in Training
You can omit the array size for the first dimension because array names are almost always converted to a pointer to the first element, so any size information is lost. That feature only applies to the first dimension, so you have to provide size information for the second dimension because the conversion to a pointer makes it a pointer to an array of N. These two function declarations are equivalent:
To avoid those errors, you can always provide sizes for all dimensions until you're comfortable with the rules. However, for arbitrary sizes in all dimensions, you have no choice but to use a dynamic array:
Of course, that's assuming you don't have libraries to work with. The standard vector class is well suited to this:
The boost library also supports a multi_array class.
void foo(int a[][10]); void bar(int (*a)[10]);
void foo(int **a, int m, int n);
int main()
{
int **a = new int*[5];
for (int i = 0; i < 5; i++)
a[i] = new int[5];
foo(a, 5, 5);
for (int i = 0; i < 5; i++)
delete [] a[i];
delete [] a;
}#include <vector> void foo(std::vector<std::vector<int> > a);
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