0_0_20227053_30018.cpp: In function 'int main()': 0_0_20227053_30018.cpp:5:15: error: 'a' was not declared in this scope printf("%d\n",a+b); ^ 0_0_20227053_30018.cpp:5:17: error: 'b' was not declared in this scope printf("%d\n",a+b); ^