0_0_16763504_28500.cpp:5:1: error: expected ',' or ';' before 'int' int in[M]; ^ 0_0_16763504_28500.cpp: In function 'int main()': 0_0_16763504_28500.cpp:13:16: error: 'in' was not declared in this scope memset(in, 0, sizeof(in)); ^