Compilare: main.cpp: In function 'int main()': main.cpp:41:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in_file, "%d", &p); ^ main.cpp: In function 'int binarySearch(int, int, int)': main.cpp:34:12: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] return k; ^ main.cpp: In function 'int main()': main.cpp:45:12: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out_file, "%d", ans != 0 ? ans : -1 ); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~