Compilare: main.cpp: In function 'int main()': main.cpp:24:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.in", "r", stdin); ^ main.cpp:25:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("transport.out", "w", stdout); ^ main.cpp:43:7: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<x<<endl; ^