Language: C++

#include <iostream>  
#include <stack>  
#include <math.h>
#define M unsigned __int64
using namespace std;
M gcd(M a, M b) {
	if (b == 0)
		return a;
	a %= b;
	return gcd(b, a);
}

M lcm(M a, M b) {
	return a / gcd(a, b)*b;
}
int main()
{
	int num;
	M clock[101], temp;
	cin >> num;
	for (int i = 1; i <= num; i++) {
		cin >> clock[i];
		if (i == 1)
			temp = clock[1];
		else
			temp = (temp, clock[i]);
	}
	cout << temp;
	return 0;
}

Compiler output:
a.cc:6:3: error: expected initializer before 'gcd'
    6 | M gcd(M a, M b) {
      |   ^~~
a.cc:13:3: error: expected initializer before 'lcm'
   13 | M lcm(M a, M b) {
      |   ^~~
a.cc: In function 'int main()':
a.cc:19:11: error: expected initializer before 'clock'
   19 |         M clock[101], temp;
      |           ^~~~~
a.cc:22:31: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   22 |                 cin >> clock[i];
      |                               ^
a.cc:22:21: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'clock_t() noexcept' {aka 'long int() noexcept'})
   22 |                 cin >> clock[i];
      |                 ~~~ ^~ ~~~~~~~~
      |                 |             |
      |                 |             clock_t() noexcept {aka long int() noexcept}
      |                 std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/iostream:42,
                 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:22:31: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'}
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
/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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'short int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(short int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'short unsigned int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(short unsigned int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'unsigned int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(unsigned int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'long int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(long int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'long unsigned int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(long unsigned int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'long long int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(long long int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'long long unsigned int' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(long long unsigned int)(clock + ((sizetype)i))' 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:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'void*' [-fpermissive]
   22 |                 cin >> clock[i];
      |                        ~~~~~~~^
      |                               |
      |                               clock_t (*)() noexcept {aka long int (*)() noexcept}
a.cc:22:31: error: cannot bind rvalue '(void*)(clock + ((sizetype)i))' to 'void*&'
/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>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:22:31: error: invalid conversion from 'clock_t (*)() noexcept' {aka 'long int (*)() noexcept'} to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   22 |                 cin >> clock[i];
      |