Compilare: user.cpp: In function ‘int main()’: user.cpp:84:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:89:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.cpp: In function ‘int query(int, int, int)’: user.cpp:17:25: warning: ‘m2’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ((v[x] <= v[y]) ? x:y); ^ user.cpp:25:13: note: ‘m2’ was declared here int m1, m2; ^ user.cpp:17:17: warning: ‘m1’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ((v[x] <= v[y]) ? x:y); ^ user.cpp:25:9: note: ‘m1’ was declared here int m1, m2; ^