Compilare: user.cpp: In function ‘int main()’: user.cpp:39:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 2; j < strlen(p); j++) ^ user.cpp:49:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < strlen(s); j++) ^ user.cpp:55:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k == strlen(p) - 1) ^ user.cpp:63:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < strlen(s); i++) ^ user.cpp:15:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.in", "r", stdin); ^ user.cpp:16:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("carte.out", "w", stdout); ^