Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19:35: error: ‘strlen’ was not declared in this scope l[i] = strlen(strCh[i] + 1) - 1; ^ user.cpp:32:47: error: ‘memset’ was not declared in this scope memset(pos, 0, sizeof(pos)); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifru4.in", "r", stdin); ^ user.cpp:14:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cifru4.out", "w", stdout); ^ user.cpp:15:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &n, &p, &k); ^ user.cpp:18:40: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(strCh[i] + 1, MAX, stdin); ^