0_0_26198189_20556.cpp: In function 'int main()': 0_0_26198189_20556.cpp:4:23: error: 'scanf' was not declared in this scope scanf("%d %d", &A, &B); ^ 0_0_26198189_20556.cpp:7:16: error: 'printf' was not declared in this scope printf("%d", C); ^