Compilare: main.cpp: In function 'char readch()': main.cpp:19:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(s, BUFF, 1, stdin); ^ main.cpp: In function 'int main()': main.cpp:81:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("carray.in", "r", stdin); ^ main.cpp:82:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("carray.out", "w", stdout); ^