C
c
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#include<stdio.h>
//Created by Infinity
//Date : 03/01/2018
//Bugs : Works only for lowercase characters
/*1.Enter string
2.Enter Key*/
int main()
{
char arr[]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
char c[50];
int b,i,j;
scanf("%s",&c);
scanf("%d",&b);
if(b>-26&&b<26)
{
for(i=0;i<strlen(c);i++)
{
for(j=26;j<strlen(arr);j++)
{
if(c[i]==arr[j])
{
c[i]=arr[j+b];
break;
}
}
}
printf("Encrypted string :\n");
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OUTPUT
Run