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#include <iostream>
template <typename T >
void f(T a,int b,int c=3);
template <typename T >
void f(T a,int b=9,int c);
int main()
{
	f(3);
	f(3,6);
	f(3,6,9);
	return 0;
}
template <typename T >
void f(T a,int b,int c)
{
	std::cout<<a<<' '<<b<<' '<<c<<'\n';
}
 

prog.cpp:5:6: error: default argument missing for parameter 3 of 'void f(T, int, int)'
 void f(T a,int b=9,int c);
      ^
prog.cpp:5:25: error: redeclaration of 'template<class T> void f(T, int, int)' may not have default arguments [-fpermissive]
 void f(T a,int b=9,int c);
                         ^
prog.cpp: In function 'int main()':
prog.cpp:8:5: error: no matching function for call to 'f(int)'
  f(3);
     ^
prog.cpp:3:6: note: candidate: template<class T> void f(T, int, int)
 void f(T a,int b,int c=3);
      ^
prog.cpp:3:6: note:   template argument deduction/substitution failed:
prog.cpp:8:5: note:   candidate expects 3 arguments, 1 provided
  f(3);
     ^

Standard output is empty