What is static_cast - C++ Data Type

C++ examples for Data Type:Cast

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Introduction

A static_cast is used for all conversions that are well-defined.

Demo Code


void func(int) {}
int main() {/* w  ww  . j  a  v a  2  s  . c  o m*/
   int i = 0x7fff; // Max pos value = 32767
   long l;
   float f;
   // (1) Typical castless conversions:
   l = i;
   f = i;
   l = static_cast<long>(i);
   f = static_cast<float>(i);
   // (2) Narrowing conversions:
   i = l; // May lose digits
   i = f; // May lose info
   // eliminates warnings:
   i = static_cast<int>(l);
   i = static_cast<int>(f);
   char c = static_cast<char>(i);
   // (3) Forcing a conversion from void* :
   void* vp = &i;
   float* fp = (float*)vp;
   fp = static_cast<float*>(vp);
   // (4) Implicit type conversions, normally performed by the compiler:
   double d = 0.0;
   int x = d; // Automatic type conversion
   x = static_cast<int>(d); // More explicit
   func(d); // Automatic type conversion
   func(static_cast<int>(d)); // More explicit
}

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