Compilare: main.cpp: In function 'int main()': main.cpp:18:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("laundering.in", "r", stdin); ^ main.cpp:19:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("laundering.out", "w", stdout); ^ main.cpp:23:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &t); ^ main.cpp:25:34: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s + 1, LMAX + 1, stdin); ^ main.cpp:56:15: warning: 'ch' may be used uninitialized in this function [-Wmaybe-uninitialized] rest[ch - 'a']--; ~~~^~~~~