Compilare: user.cpp: In function ‘char getChar()’: user.cpp:25:52: 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) pos = 0, fread(buf, 1, BUF, fin); ^ user.cpp: In function ‘int getInt()’: user.cpp:33:21: warning: ‘c’ is used uninitialized in this function [-Wuninitialized] while(!isdigit(c)) c = getChar(); ^ user.cpp: In function ‘int main()’: user.cpp:33:21: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:31:10: note: ‘c’ was declared here char c; ^ user.cpp:33:21: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!isdigit(c)) c = getChar(); ^ user.cpp:31:10: note: ‘c’ was declared here char c; ^ user.cpp:33:21: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(!isdigit(c)) c = getChar(); ^ user.cpp:31:10: note: ‘c’ was declared here char c; ^