Example(s):Palindrome, prime, armstrong, "linear search", reverse etc.
Example(s):1575, 1632, 1539 (Only one at a time)
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Solved Problem
#CPP#5026
Problem Statement - Count alphabets in a file
Write a program to count alphabets in a given file “NOTES.TXT”. What would be the output when this file is tested with the NOTES.TXT file containing the following lines.
This is first line
This is second line
This is third line
Solution
TC++ #5026
Run Output
No. of alphabets in given file = 46
#include <fstream.h> //This include file is required to support ifstream class #include <ctype.h> //This include is required to use isalpha() function
ifstream ipfile(“NOTES.TXT”,ios::in); Opening file NOTES.TXT in input. For proper functioning this file must be created in advance.
int c=0; //This will store the count of alphabet.
if(!ipfile) {cout<<“Unable to open file”<<endl;return 1;}
To ensure that input file is present this code must be added, else the program can go haywire.
while(!ipfile.eof()) { //This loop runs till the input file reaches the end char ch=ipfile.get(); //Character is read using the .get function of ifstream object if(isalpha(ch)) c++; //The counter is incremented only when the character read is an upper or lower case alphabet
cout<<“No. of alphabets in given file = “<<c<<endl; The count is alphabet is printed outside the loop.
Notes
This code can be tested on your local system only once a file with given content is created with its name as NOTES.TXT
It is always a good practice to check if the file has been opened properly. It will not open properly in many cases. One can reach the OS by returning an error to the operating system.
For DOS testing with TurboC environment, learners are advised to keep the input file in the BIN directory are the turboc program runs from there.
