Compilare: user.cpp: In function ‘void xsort(int, int)’: user.cpp:26:47: warning: operation on ‘v[j]’ may be undefined [-Wsequence-point] v[i] = v[i] + v[j] - (v[j] = v[i]); ^ user.cpp: In function ‘int main()’: user.cpp:43:12: warning: unused variable ‘aux’ [-Wunused-variable] int n, aux, i; ^ user.cpp:45:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:48:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^