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#include "stdio.h"
int main()
{
int const a=9;
int* b = (int*)&a;
*b=3;
printf("a=%d b=%d\n", a, *b); //a=9 b=3
int* c = const_cast<int*>(&a);
*c=3;
printf("a=%d c=%d\n", a, *c); //a=9 c=3
return 0;
}