Compilare: main.cpp: In function 'bool verif_int(int)': main.cpp:47:15: warning: statement has no effect [-Wunused-value] for (step ; step != 0 ; step >>= 1) ^ main.cpp: In function 'int main()': main.cpp:70:9: warning: variable 'x' set but not used [-Wunused-but-set-variable] int x, y, q ; ^ main.cpp:70:12: warning: variable 'y' set but not used [-Wunused-but-set-variable] int x, y, q ; ^ main.cpp: In function 'char nextch()': main.cpp:13:34: 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); ^