Submission #2553433

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
long long n
double a[100005];
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	cin>>a[i];
	printf("%.3f",(a[n]-a[1])/(n-1));
	return 0;
}

Submission Info

Compile Error

./Main.cpp:4:1: error: expected initializer before ‘double’
 double a[100005];
 ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:7:7: error: ‘n’ was not declared in this scope
  cin>>n;
       ^
./Main.cpp:9:7: error: ‘a’ was not declared in this scope
  cin>>a[i];
       ^
./Main.cpp:10:17: error: ‘a’ was not declared in this scope
  printf("%.3f",(a[n]-a[1])/(n-1));
                 ^