Eroare de compilare: user.cpp:1:2: error: invalid preprocessing directive #includestdio user.cpp:17:2: warning: no newline at end of file user.cpp:2: error: expected constructor, destructor, or type conversion before '*' token user.cpp: In function 'int main()': user.cpp:7: error: 'in' was not declared in this scope user.cpp:7: error: 'a' was not declared in this scope user.cpp:7: error: 'fscanf' was not declared in this scope user.cpp:8: error: 'b' was not declared in this scope user.cpp:11: error: 'r' was not declared in this scope user.cpp:15: error: 'out' was not declared in this scope user.cpp:15: error: 'fprintf' was not declared in this scope user.cpp:16: error: 'out' was not declared in this scope user.cpp:16: error: 'fprintf' was not declared in this scope