0_0_18427923_11842.cpp: In function 'int main()': 0_0_18427923_11842.cpp:5:18: error: 'scanf' was not declared in this scope scanf("%d",&m); ^ 0_0_18427923_11842.cpp:14:33: error: 'printf' was not declared in this scope printf("%.2lf\n",sum); ^