0_0_16504514_30705.cpp: In function 'int main()': 0_0_16504514_30705.cpp:8:17: error: 'a' was not declared in this scope scanf("%d%d",&a,&b); ^ 0_0_16504514_30705.cpp:8:20: error: 'b' was not declared in this scope scanf("%d%d",&a,&b); ^