Compilare: user.cpp: In function ‘int main()’: user.cpp:88:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^ user.cpp:18:21: warning: ‘i’ is used uninitialized in this function [-Wuninitialized] cf[i] = x % 10; ^ user.cpp:16:9: note: ‘i’ was declared here int i; ^ user.cpp:16:9: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:16:9: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:65:10: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] i++; ^ user.cpp:59:13: note: ‘i’ was declared here int tr, i; ^