Compilare: user.cpp: In function ‘int main()’: user.cpp:11:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &numTests); ^ user.cpp:13:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%lld%d", &n, &m, &x); ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &freq); ^ user.cpp:20:51: warning: ‘xFreq’ may be used uninitialized in this function [-Wmaybe-uninitialized] xFreq = xFreq ^ ((xFreq ^ freq) & -(i == x)); ^