0_0_18449087_12786.cpp: In function 'int main()': 0_0_18449087_12786.cpp:7:14: error: 'scanf' was not declared in this scope scanf("%d",&a); ^ 0_0_18449087_12786.cpp:15:24: error: 'printf' was not declared in this scope printf("string #%d\n",b); ^