Compilare: main.cpp: In function 'int main()': main.cpp:67:9: warning: variable 'x' set but not used [-Wunused-but-set-variable] int x, y, q ; ^ main.cpp:67:12: warning: variable 'y' set but not used [-Wunused-but-set-variable] int x, y, q ; ^ main.cpp: In function 'char nextch()': main.cpp:15:34: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, MAXBUF, in); ^