Write a C++ program that inputs the contents of a file line by line, and outputs each line to the console. The program starts by inputting the name of the file from the keyboard, opens the file, and then checks to make sure the file was opened successfully. If not, the program outputs "**file not found" and returns.

If the file was opened successfully, the program proceeds to read the file line by line, outputting each line to the console along with its line number. Assume each line of the input file contains a single word. For example, suppose the file "input1.txt" contains the following:

apple

banana

pear

pizza

Given the filename "input1.txt", your program should produce the following output:

line 1: apple

line 2: banana

line 3: pear

line 4: pizza

main.cpp

#include #include #include

using namespace std;

int main() { string filename; cout << "please enter filename> "; cin >> filename; // input filename: cout << endl; // // TODO: // return 0; }