View Compilation Error

0_0_38405096_28504.cpp: In function 'int main()':
0_0_38405096_28504.cpp:2:2: error: '__int64' was not declared in this scope
  __int64 fib[51]={0,1};
  ^
0_0_38405096_28504.cpp:5:3: error: 'fib' was not declared in this scope
   fib[i]=fib[i-1]+fib[i-2];
   ^
0_0_38405096_28504.cpp:7:21: error: 'scanf' was not declared in this scope
  while(scanf("%d",&n)!=EOF && n!=-1){
                     ^
0_0_38405096_28504.cpp:7:24: error: 'EOF' was not declared in this scope
  while(scanf("%d",&n)!=EOF && n!=-1){
                        ^
0_0_38405096_28504.cpp:9:21: error: 'fib' was not declared in this scope
    printf("%I64d\n",fib[n]);
                     ^
0_0_38405096_28504.cpp:9:27: error: 'printf' was not declared in this scope
    printf("%I64d\n",fib[n]);
                           ^