Write a program that uses an array to count and report the frequency of occurren

Question

Write a program that uses an array to count and report the frequency of occurrence of the letters in the text

document provided with this lab (you can code this into your program as a String).

The text was originally written in English; spaces and punctuation have been removed, and the text was then

encrypted with a simple substitution cipher.

a: Decrypt the text

b: Write a program that encrypts a string of text using a cipher of your own design.

For this option, you must also provide a decryption method.

The text is as follows:

Explanation / Answer

#include<stdio.h>

int main()

{

char string[1000];

int array[26]= {0};

int i,j,x,y;

scanf("%s",string);

int z=strlen(string);

for(i=0; i<z; i++)

{

x=(int)string[i];

y=x-65;

array[y]++;

}

for(j=0; j<26; j++)

printf("occurences of %c are : %d ",j+65,array[j]);

//encryption

for(i=0; i<z; i++)

{

string[i]=string[i]+1;

}

printf(" Encrypted string is : %s",string);

//Decryption

for(i=0; i<z/2; i++)

{

string[i]=string[i]-1;

}

printf(" Decrypted string is : %s",string);

return 0;

}

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