Compiler Warning (level 3) C4310
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Compiler Warning (level 3) C4310

Error Message

cast truncates constant value

A constant value is cast to a smaller type. The compiler performs the cast, which truncates data. The following sample generates C4310:

// C4310.cpp
// compile with: /W4
int main() {
   long int a;
   a = (char) 128;   // C4310, use value 0-127 to resolve
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