Compilare: main.cpp: In function 'int main()': main.cpp:26:44: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while ( j < BSIZE && ( buf[j] >= '0' && buf[j] <= '9' || buf[j] == '-' ) ) { ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:16:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d ", &n, &k ); ^ main.cpp:23:32: 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, BSIZE, fin ); ^