Language: C++

#include<bits/stdc++.h>

using namespace std;

#define max 1000005

int main()
{
	bool a[max+1];
	memset(a,true,sizeof(a));
	 int t=0;
	 
	 for(int i=2;i*i<=max;i++)
	 
	 {
	 	
	 	
	 	
	 if(a[i])
	 {
	 	
	 	for(int j=i*i;j<=max;j+=i)
	 	{
	 		a[j]=false;
	 		
	 		
	 		
		 }
	 	
	 	
	 	
	 	
	 }
	  }
	  
	  int a,b;
	  cin>>a>>b;
	  int min;
	  
	  if(a<b)
	  min=a;
	  
	  else
	  min=b;
	  int ans=1;
	  
	  for(int i=2;i*i<=a;i++)
	  {
	  	if(a[i]&&(a%i==0)&&(b%i==0))
	  	ans++;
	  	
	  	
	  	
	  }
	  cout<<ans;
	  
	 	
	 //	int k=1;
	 	
	 		
	 /*	 while(t<n)
	 	 {
	 	 	 k++;
	 	    if(a[k])
			 t++;
			 
			 	
	 	 	
	 	 	
		  }
		  
		  
		  return k;*/

	
return 0;	
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:15: error: conflicting declaration 'int a'
   36 |           int a,b;
      |               ^
a.cc:9:14: note: previous declaration as 'bool a [1000006]'
    9 |         bool a[max+1];
      |              ^
a.cc:37:14: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'bool [1000006]')
   37 |           cin>>a>>b;
      |           ~~~^~~
      |           |    |
      |           |    bool [1000006]
      |           std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'bool*'
   37 |           cin>>a>>b;
      |                ^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'short int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(short int)((bool*)(& a))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'short unsigned int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(short unsigned int)((bool*)(& a))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(int)((bool*)(& a))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'unsigned int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(unsigned int)((bool*)(& a))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'long int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(long int)((bool*)(& a))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'long unsigned int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(long unsigned int)((bool*)(& a))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'long long int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(long long int)((bool*)(& a))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: invalid conversion from 'bool*' to 'long long unsigned int' [-fpermissive]
   37 |           cin>>a>>b;
      |                ^
      |                |
      |                bool*
a.cc:37:16: error: cannot bind rvalue '(long long unsigned int)((bool*)(& a))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:37:16: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
   37 |           cin>>a>>b;
      |                ^
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:25: note:   no known conversion for argument 1 from 'bool [1000006]' to 'float&'
  219 |       operator>>(float& __f)
      |                  ~~~~~~~^~~
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:26: note:   no known conversion for argument 1 from 'bool [1000006]' to 'double&'
  223 |       operator>>(double& __f)
      |                  ~~~~~~~~^~~
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:31: note:   no known conversion for argument 1 from 'bool [1000006]' to 'long double&'
  227 |       operator>>(long double& __f)
      |                  ~~~~~~~~~~~~~^~~
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:36: note:   no known conversion for argument 1 from 'bool [1000006]' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'}
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |                  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = s