Compilare: user.cpp: In function ‘int step1()’: user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int printc()’: user.cpp:79: warning: no return statement in function returning non-void user.cpp: In function ‘int step2()’: user.cpp:89: warning: no return statement in function returning non-void