Compilare: user.cpp: In function ‘int invbin(int, int)’: user.cpp:70:7: warning: unused variable ‘v’ [-Wunused-variable] int v[30], i, j, ni, nj; ^ user.cpp: In function ‘int main()’: user.cpp:98:21: warning: unused variable ‘log’ [-Wunused-variable] int n, m, i, p, log, cn; ^ user.cpp:98:26: warning: unused variable ‘cn’ [-Wunused-variable] int n, m, i, p, log, cn; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:20:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 2097152, fin); ^