🚀 go-pugleaf

In <41gsif$1sa@eegradsrv.ee> adevasth@mtu.edu (Abhijit) writes:

: #include <iostream.h>
: main() {
:    void LU(int, float[][55], float[][55], float[][55], float[]);
:    void Display_lu(int, float[][55], float[][55], float[]); 
:    int n;
:    float A[55][55], L[55][55], U[55][55], d[55];
:    LU(n, L, A, U, d);
:    Display_lu(n, L, U, d);
: }
: void LU(int n, float L[][55], float A[][55], float U[][55], float d[]) {
:   cout << "HERE IN LU" << endl;
: }
: void Display_lu(int n, float L[][55], float U[][55], float d[]) {
:   cout <<"HERE IN DISPLAY" << endl;
: }
[...]

: But if I write the two prototypes above main() then it compiles and executes
: without any problem. So why do I have to make the functions global??
: Any help is appreciated.

You seem to confuse global and static:
Since you declared LU and Display_lu in the scope of the main body,
they are known inside the { } of main only.
You need to have file scope by putting it above the main as you said.
If you don't want them to appear global in the sense that external functions
in other files can link to them, you need to add the static keyword.

That's not LEDA specific, so please look again in a good C (or C++) book...


Bye, Heribert (dahms@ifk20.mach.uni-karlsruhe.de)