Intro to Microprocessors and Assembly

Lab $9$

Program: x$86$ Frequency Count

Write a program that would determine the number of times that each letter of the alphabet appears in a string of characters.

The program should allow the user to enter a string of characters $($up to $254).$ The program should echo the input string, and then print a table that shows the number of times that each letter was used. The program should treat upper and lower case letters as indistinguishable. All non$-$letter characters should be ignored. The program should ask the user if he or she wants to do it again, and then respond in the appropriate way.

Sample dialog:

Please enter a string of characters:

Mary had a little lamb.

The entered string is:

Mary had a little lamb.

Frequency table

$\backslash$table$[[$Character$,$Frequency,Character,Frequency$],[$A$,04,$N$,00],[$B$,01,0,00],[$C$,00,.,],[$D$,01,.,*$