View Compilation Error

0_0_14722682_10424.cpp: In function 'int main()':
0_0_14722682_10424.cpp:5:5: error: '_int64' was not declared in this scope
     _int64 f[55] = {0, 1, 2};
     ^
0_0_14722682_10424.cpp:7:9: error: 'f' was not declared in this scope
         f[i] = f[i - 2] + f[i - 1];
         ^
0_0_14722682_10424.cpp:12:27: error: 'f' was not declared in this scope
         printf("%I64d\n", f[b - a]);
                           ^