View Compilation Error

0_0_33218494_20972.cpp: In function 'int main()':
0_0_33218494_20972.cpp:11:5: error: '_int64' was not declared in this scope
     _int64 a[55];
     ^
0_0_33218494_20972.cpp:12:5: error: 'a' was not declared in this scope
     a[1]=3;
     ^