Thread: In over my head with character frequency code

Hi everyone,

I have decided to take a intermediate level C programming course with absolutely no programming experience. Most of the HW involved manipulating integers but the last question involves strings and I don't know how to manipulate them and I am running out of time.

I have to create a program that features a loop that prompts the user to enter a string of lower case letters and tallies the frequency of each character. The code I have does that, but I can't figure out how to phrase the loop condition to that will prompt the user again for a string and then add those character tallies to the total. The program is supposed to keep prompting and adding until an EOF character (CTRL+Z or ^Z) is entered.

All my attempts either go into an infinite loop without printing or overwrites previous counts a new tally for every subsequent string.

HELP!

Code:

#include<stdio.h>
#include<string.h>
 
main()
{
   char string[100], ch;
   int c = 0, count[26] = {0};
 
   printf("Enter a string");
   scanf("%c", &string);
 
   while ( string[c] != ''\0' )
   {
 
      if ( string[c] >= 'a' && string[c] <= 'z' ) 

         count[string[c]-'a']++;

      c++;
   }
 
   for ( c = 0 ; c < 26 ; c++ )
   {
      if( count[c] != 0 )
         printf("%c occurs %d times in the entered string.", c+'a', count[c]);

   }
 
   return 0;
}

First in your scanf() %c is used to retrieve a single character not a "string", you may want to read the documentation for scanf() and use the proper specifier for a string.

Jim

Line 12 can't​ be right...