Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp:3: error: expected constructor, destructor, or type conversion before ‘*’ token user.cpp:4: error: expected constructor, destructor, or type conversion before ‘*’ token user.cpp: In function ‘int main()’: user.cpp:11: error: ‘fin’ was not declared in this scope user.cpp:11: error: ‘fscanf’ was not declared in this scope user.cpp:15: error: ‘fout’ was not declared in this scope user.cpp:15: error: ‘fprintf’ was not declared in this scope user.cpp:16: error: ‘fclose’ was not declared in this scope user.cpp: In function ‘int Area()’: user.cpp:35: error: ‘abs’ was not declared in this scope