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  1. #include <iostream>
  2.  
  3. void f1(){
  4.    //szは定数
  5.    const int sz = 10;
  6.    const_cast<int&>(sz) = 15;
  7.    char a[sz];
  8.    std::cout << sz << " : " << sizeof(a) << std::endl;
  9. }
  10. void f2(const int sz){
  11.    //szはconst変数
  12.    const_cast<int&>(sz) = 15;
  13.    char a[sz];
  14.    std::cout << sz << " : " << sizeof(a) << std::endl;
  15. }
  16. int main(){
  17.    f1();
  18.    f2(10);
  19.    return 0;
  20. }
  21.  
Success #stdin #stdout 0.01s 2724KB
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stdin
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Standard input is empty
stdout
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10 : 10
15 : 15
https://ideone.com/2lAdl
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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