CS256 - Principles of Structured Design Fall 2021

Displaying ./code/sternflCode/cipher1.c

#include<stdio.h>
#include<string.h>

void prtAlpha(char a[]) {
  for(int i=0; i<26;i++)
    printf("%c", a[i]);
  printf("\n");
}

//non zero : true (is a duplicate)
//zero: false (is NOT A dup)
int isDup(int in, int numletters, char noDup[]) {
  for(int i=0; i<numletters; i++)
    if (in==noDup[i]) return 1;
  return 0;
}

int main() {
  char clearAlpha[26];
  char cipherAlpha[26];
  for (int i=0; i<26; i++)
    clearAlpha[i] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i];

  prtAlpha(clearAlpha);
  printf("Please enter your key word >");
  char keyWord[26];
  
  scanf("%s", keyWord);
  printf("the key word is %s\n", keyWord);

  char noDup[26];
  int len = strlen(keyWord);

  //size of noDup
  int sz=0;
  for(int i=0; i<len; i++)
     if (!isDup(keyWord[i], sz, noDup)) {
       noDup[sz] = keyWord[i];  //was an i instead of sz
       sz++;
     }

  for(int i=0; i<sz; i++)
     printf("%c", noDup[i]);
  printf("\n");
}