Eroare de compilare: user.cpp:1:21: error: iostream.h: No such file or directory user.cpp: In function ‘int div(int)’: user.cpp:11: warning: no return statement in function returning non-void user.cpp: In function ‘int valid(int)’: user.cpp:14: warning: unused variable ‘i’ user.cpp: In function ‘int main()’: user.cpp:28: error: ‘FILE’ was not declared in this scope user.cpp:28: error: ‘f1’ was not declared in this scope user.cpp:28: error: ‘f2’ was not declared in this scope user.cpp:29: error: ‘fopen’ was not declared in this scope user.cpp:31: error: ‘feof’ was not declared in this scope user.cpp:32: error: ‘fscanf’ was not declared in this scope user.cpp:36: error: ‘fprintf’ was not declared in this scope