Compiler Warning (level 3) C4310

 

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The latest version of this topic can be found at Compiler Warning (level 3) C4310.

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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