0_0_24826158_32137.cpp: In function 'int main()': 0_0_24826158_32137.cpp:5:2: error: '_int64' was not declared in this scope _int64 arr[21]; ^ 0_0_24826158_32137.cpp:7:2: error: 'arr' was not declared in this scope arr[1]=0;arr[2]=1; ^