Compilare: user.cpp: In function ‘int main()’: user.cpp:14: warning: format ‘%s’ expects type ‘char*’, but argument 3 has type ‘char (*)[256]’ user.cpp:32: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:63: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:14: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:8: warning: ‘c’ may be used uninitialized in this function