Compilare: user.cpp: In function ‘int main()’: user.cpp:81: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:112: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:138: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:77: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:106: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result user.cpp:132: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result