q11p2.cpp

#include <iostream>
#include <string>
#include <cstdlib>
#include <algorithm>
#include <fstream>
using namespace std;

void check_banana (string banana){
ifstream AbrirBanana;
AbrirBanana.open(banana);
string col;
int n = 0;

		while(AbrirBanana.tellg() != -1){
			AbrirBanana >> col;
			for(int i = 0; i< col.size(); i++){
				if( (col[i] == 'B' or col[i] == 'b') and
					(col[i+1] == 'A' or col[i+1] == 'a') and
					(col[i+2] == 'N' or col[i+2] == 'n') and
					(col[i+3] == 'A' or col[i+3] == 'a') and
					(col[i+4] == 'N' or col[i+4] == 'n') and
					(col[i+5] == 'A' or col[i+5] == 'a') )
					n++;
			}
		}
		cout<<"La cantidad de veces que está escrita la palabra banana es: "<<n<<endl;
}

int main(){
	check_banana("banana.txt");
	return 0;
}