Compilare: user.cpp: In function ‘int main()’: user.cpp:47:30: warning: unused variable ‘ind1’ [-Wunused-variable] int i, j, rasp = 0, sum, ind1, ind2; ^ user.cpp:47:36: warning: unused variable ‘ind2’ [-Wunused-variable] int i, j, rasp = 0, sum, ind1, ind2; ^ user.cpp: In function ‘char next()’: user.cpp:11:52: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos == BUF) fread(buf, 1, BUF, fin), pos = 0; ^