0_0_32156848_2258.cpp: In function 'int main()': 0_0_32156848_2258.cpp:5:18: error: 'scanf' was not declared in this scope scanf("%d",&n); ^ 0_0_32156848_2258.cpp:29:35: error: 'printf' was not declared in this scope printf("%02d:%02d\n",ph,pm); ^