expected constant expression
The context requires a constant expression, an expression whose value is known at compile time.
Example
The following sample generates C2057:
// C2057.cpp
int i;
int b[i]; // C2057
int main() {
const int i = 8;
int b[i];
}
C has more restrictive rules for constant expressions. The following sample generates C2057:
// C2057b.c
#define ArraySize1 10
int main() {
const int ArraySize2 = 10;
int h[ArraySize2]; // C2057
int h[ArraySize1]; // OK
}