Compilare: user.cpp: In function ‘int main()’: user.cpp:121: warning: name lookup of ‘i’ changed user.cpp:92: warning: matches this ‘i’ under ISO standard rules user.cpp:104: warning: matches this ‘i’ under old rules user.cpp:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:60: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:61: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:91: warning: ‘t’ may be used uninitialized in this function