Compilare: user.cpp: In function ‘int main()’: user.cpp:20: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:96: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:108: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:125: warning: comparison between signed and unsigned integer expressions user.cpp:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result