Compilare: user.cpp: In function ‘int main()’: user.cpp:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:51: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int cb1(int)’: user.cpp:21: warning: ‘poz’ may be used uninitialized in this function user.cpp: In function ‘int cb2(int)’: user.cpp:33: warning: ‘poz’ may be used uninitialized in this function