View Compilation Error

0_0_33885194_12792.cpp: In function 'int main()':
0_0_33885194_12792.cpp:5:5: error: '_int64' was not declared in this scope
     _int64 a[50];
     ^
0_0_33885194_12792.cpp:9:13: error: 'a' was not declared in this scope
             a[1]=2;
             ^