C++ Class Help.

[ConfusedLearner]

Using a text editor (i.e. Notepad), create a text file called Text1.txt and place it into a folder of your choosing.
Fill Text1.txt with a sentence and save the file.
Then, write a C++ program that performs the following:
1. Reads the sentence from the file Text1.txt and display it on the screen.
2. Asks the user to enter a lowercase letter (a-z) with the keyboard.
3. Count and display the number of times that the entered letter appears in the sentence read from the file.

This Is What I have so far, dont know how to finish it.

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

using namespace std;

int main()
{
ifstream inFile ("d:/Text1.txt", ios::in);
char sentence[80];

if(!inFile)
{
cerr<<"File Text1.txt could not be opened"<<endl;
exit(1);
}

inFile.getline(sentence,80);

cout<<endl;
cout<<"The file Text1.txt contains the following sentence:";
cout<<endl;
cout<<sentence;
inFile.close();
cout<<endl;

cout<<"Please enter a lowercase letter between (a-z):";
char letter;
cin>> letter;










return 0;

}

[Peter87]

What you have left to do is to count how many times letter occurs in sentence.

[ConfusedLearner]

Really dont how to that, that is my problem. Can you help?

[Peter87]

So in real life if you have a sentence "hello world!" on a paper and you want to know how many times the letter l occurs in that sentence, how would you do that?

[ConfusedLearner]

Need a word count, and maybe a while loop? I have tried different ways to get it but it wouldnt work.

[Peter87]

Sounds like it could work. Try that!

[ConfusedLearner]

Once again I have and still not working. Do you have any ideas to help me complete this program?

[LB]

On a piece of paper, write down EVERY STEP you do to see how many times a letter is in a word. For instance:

look at first letter
  is this the letter I am counting?
    if it is, add to the count in my head
look at second letter
  is this the letter I am counting?
    if it is, add to the count in my head
[etc...]

[ConfusedLearner]

Ok this is what I have so far. I can now input different letters from a to z, but my program isnt counting them and telling my how many "a" is in my sentence, or "b", etc, etc.

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

using namespace std;

int main()
{
ifstream inFile ("e:/Text1.txt", ios::in);
char sentence[80];

if(!inFile)
{
cerr<<"File Text1.txt could not be opened"<<endl;
exit(1);
}

inFile.getline(sentence,80);

cout<<endl;
cout<<"The file Text1.txt contains the following sentence:";
cout<<endl;
cout<<sentence;
inFile.close();
cout<<endl;

cout<<"Please enter a lowercase letter between (a-z):";
char letter;
cin>> letter;



char* ch_ptr;
int counter_letter = 0;
for (ch_ptr = sentence; *ch_ptr != '\0'; ++ch_ptr);

while (*ch_ptr==letter)
++counter_letter;

cout<< "The number of occurences of the letter " << letter << " is " << counter_letter << endl << endl;



return 0;

}

[ConfusedLearner]

So far Im on a good track, but my program isnt counting how many "a", "b", through "z". Im completely suck here. HELP!!!! PLEASE!!!!

[Peter87]

It is almost working. You have a semicolon after the for loop that shouldn't be there, and the while loop should be an if statement I think

[ConfusedLearner]

Peter87 I want to say thank you for taking time out of your day to help me solve my program. I really appreciate it so much. This is the correction I have made from your last comment. I am almost done, but my program is still not showing me the number of occurrences of the letter, it keeps on giving me 0 each time, just not seeing why.

#include<iostream>
#include<fstream>
#include<cstdlib>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

using namespace std;

int main()
{
ifstream inFile ("e:/Text1.txt", ios::in);
char sentence[80];

if(!inFile)
{
cerr<<"File Text1.txt could not be opened"<<endl;
exit(1);
}

inFile.getline(sentence,80);

cout<<endl;
cout<<"The file Text1.txt contains the following sentence:";
cout<<endl;
cout<<sentence;
inFile.close();
cout<<endl;

cout<<"Please enter a lowercase letter between (a-z):";
char letter;
cin>> letter;


char* ch_ptr;
int counter_letter = 0;
for (ch_ptr = sentence; *ch_ptr != '\0'; ++ch_ptr);

if (*ch_ptr==letter)
++counter_letter;

cout<< "The number of occurences of the letter " << letter << " is " << counter_letter << endl << endl;










return 0;

}

[Peter87]

You forgot to remove the semicolon after the for loop.

[ConfusedLearner]

If I do, the program would stop working if I remove the semicolon.

[Peter87]

for (ch_ptr = sentence; *ch_ptr != '\0'; ++ch_ptr); // I'm talking about the semicolon here
if (*ch_ptr==letter)
	++counter_letter;

for (ch_ptr = sentence; *ch_ptr != '\0'; ++ch_ptr) // It will work much better without it
	if (*ch_ptr==letter)
		++counter_letter;

[ConfusedLearner]

You are Awesome thank you, this program is so sensitive. I have one more question I need not to exit after I put in one function.