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#include <iostream>
using namespace std;
#include <math.h>
 
int main() {
	printf("Bilangan = ");
	int bilangan;
	scanf("%d", &bilangan);
 
	int a = 0;
	int y;
 
	while(bilangan>0)
		{
			bilangan = bilangan / 2;
			if(bilangan == 0)
				{
					a = a + 1;
					y = pow(2 ^ 0);
					int arr[a] = y;
					printf("%d", arr[a]);
				}
		}
	return 0;
}

prog.cpp: In function ‘int main()’:
prog.cpp:19:19: error: no matching function for call to ‘pow(int)’
      y = pow(2 ^ 0);
                   ^
In file included from /usr/include/features.h:364:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/c++config.h:507,
                 from /usr/include/c++/6/iostream:38,
                 from prog.cpp:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:153:1: note: candidate: double pow(double, double)
 __MATHCALL_VEC (pow,, (_Mdouble_ __x, _Mdouble_ __y));
 ^
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:153:1: note:   candidate expects 2 arguments, 1 provided
In file included from /usr/include/c++/6/math.h:36:0,
                 from prog.cpp:3:
/usr/include/c++/6/cmath:438:5: note: candidate: template<class _Tp, class _Up> constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type std::pow(_Tp, _Up)
     pow(_Tp __x, _Up __y)
     ^~~
/usr/include/c++/6/cmath:438:5: note:   template argument deduction/substitution failed:
prog.cpp:19:19: note:   candidate expects 2 arguments, 1 provided
      y = pow(2 ^ 0);
                   ^
In file included from /usr/include/c++/6/math.h:36:0,
                 from prog.cpp:3:
/usr/include/c++/6/cmath:415:3: note: candidate: constexpr long double std::pow(long double, long double)
   pow(long double __x, long double __y)
   ^~~
/usr/include/c++/6/cmath:415:3: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/6/cmath:411:3: note: candidate: constexpr float std::pow(float, float)
   pow(float __x, float __y)
   ^~~
/usr/include/c++/6/cmath:411:3: note:   candidate expects 2 arguments, 1 provided
prog.cpp:20:19: error: array must be initialized with a brace-enclosed initializer
      int arr[a] = y;
                   ^

Standard output is empty