Compilare: user.cpp: In function ‘int main()’: user.cpp:45:69: warning: operation on ‘A[0]’ may be undefined [-Wsequence-point] while (isdigit(line[A[0] + 1])) A[++A[0]] = line[A[0]] - '0'; ^ user.cpp:49:69: warning: operation on ‘B[0]’ may be undefined [-Wsequence-point] while (isdigit(line[B[0] + 1])) B[++B[0]] = line[B[0]] - '0'; ^ user.cpp:38:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easylca.in", "r", stdin); ^ user.cpp:39:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easylca.out", "w", stdout); ^ user.cpp:41:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &tests); ^ user.cpp:44:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", line + 1); ^ user.cpp:48:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", line + 1); ^