0_0_13156184_20376.cpp: In function 'int main()': 0_0_13156184_20376.cpp:80:27: error: 'a' was not declared in this scope scanf("%d%d",&a,&b); ^ 0_0_13156184_20376.cpp:80:30: error: 'b' was not declared in this scope scanf("%d%d",&a,&b); ^