Eroare de compilare: user.cpp: In function 'int main()': user.cpp:33: error: 'nr' was not declared in this scope user.cpp:33: error: 'sum' was not declared in this scope user.cpp:34: error: 'a' was not declared in this scope user.cpp:34: error: 'ok' was not declared in this scope user.cpp:34: error: 'ok' was not declared in this scope user.cpp:37: error: 'a' was not declared in this scope user.cpp:38: error: 'a' was not declared in this scope user.cpp:39: error: assignment of function 'double exp(double)' user.cpp:39: error: cannot convert 'int' to 'double ()(double)throw ()' in assignment user.cpp:40: error: 'a' was not declared in this scope user.cpp:42: error: ISO C++ forbids incrementing a pointer of type 'double (*)(double)throw ()' user.cpp:42: error: lvalue required as increment operand user.cpp:45: error: pointer to a function used in arithmetic user.cpp:45: error: expected `}' at end of input user.cpp:45: error: expected `}' at end of input user.cpp:45: error: expected `}' at end of input