Compilare: main.cpp: In function 'int main()': main.cpp:86:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("trenuri.out", "w", stdout); ^ main.cpp: In function 'char nextch()': main.cpp:69:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fin), pos = 0; ^