View Code of Problem 23

#include<iostream>
int main(){
	int M;
	int a[1000];
	a[0]=1,a[1]=1;
	for(int i=2;i<1000;i++){
		a[i]=a[i-1]+a[i-2];
	}
	while(scanf("%d",&M)&&M!=0){
		cout<<a[M]<<'\n';
	}
} 
/*
Main.cc: In function 'int main()':
Main.cc:10:3: error: 'cout' was not declared in this scope
   cout<<a[M]<<'\n';
   ^~~~
Main.cc:10:3: note: suggested alternative:
In file included from Main.cc:1:
/usr/include/c++/8/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^~~~
*/