View Compilation Error

0_0_15640142_8686.cpp: In function 'int main()':
0_0_15640142_8686.cpp:4:2: error: '_int64' was not declared in this scope
  _int64  std[51] = { 1,1 };
  ^
0_0_15640142_8686.cpp:8:6: error: expected primary-expression before '[' token
   std[i] = std[i - 1] + std[i - 2];
      ^
0_0_15640142_8686.cpp:8:15: error: expected primary-expression before '[' token
   std[i] = std[i - 1] + std[i - 2];
               ^
0_0_15640142_8686.cpp:8:28: error: expected primary-expression before '[' token
   std[i] = std[i - 1] + std[i - 2];
                            ^
0_0_15640142_8686.cpp:10:18: error: 'scanf_s' was not declared in this scope
  scanf_s("%d", &b);
                  ^
0_0_15640142_8686.cpp:14:24: error: expected primary-expression before '[' token
   printf("%I64d\n", std[m - n]);
                        ^