Compilare: user.cpp: In function ‘int main()’: user.cpp:18:34: warning: operation on ‘c’ may be undefined [-Wsequence-point] v[--c] = v[c + 1]; ^ user.cpp:27:34: warning: operation on ‘c’ may be undefined [-Wsequence-point] v[--c] = v[c + 1]; ^ user.cpp:11:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d%d", &n, &k); ^ user.cpp:16:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &v[++c]); ^ user.cpp:25:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &v[++c]); ^