#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
char k[20]={'\0'},pt[30]={'\0'},key[30]={'\0'},mat[10][10]={'\0'},ct[30]={'\0'};
int i=0,j=0,no[10]={0},ctr,z,c=0,a=0;
clrscr();
printf("Enter the plaintext:\n");
gets(pt);
printf("Enter the key:\n");
gets(k);
strcpy(key,k);
strcat(k,pt);
strcpy(pt,k);
printf("Enter the ordering starting from 0 to the (keylength-1):\n");
for(i=0;i<strlen(key);i++)
{
scanf("%d",&no[i]);
}
j=0;
ctr=j;
printf("The matrix is:\n");
for(i=0;i<strlen(pt);i++)
{
for(j=j;ctr<strlen(key);j++)
{
if(pt[j]!='\0')
{
mat[i][ctr]=pt[j];
printf("%c",mat[i][ctr]);
ctr++;
}
else
{
goto out;
}
}
ctr=0;
if(i==0) printf("\n");
printf("\n");
}
out:
printf("\n\nThe Encrypted text is:\n");
for(i=0;i<strlen(key);i++)
{
for(j=0;j<strlen(key);j++)
{
if(no[i]==j)
{
for(z=1;z<10;z++)
{
if(isalpha(mat[z][j]))
{
printf("%c",mat[z][j]);
ct[a]=mat[z][j];
a++;
}
}
}
}
}
printf("\n\nDecrypted Ciphertext is:\n");
for(a=0;a<30;a++)
{
if(isalpha(ct[a]) || isspace(ct[a]))
c++;
}
for(i=1;i<c;i++)
{
for(j=0;j<strlen(key);j++)
{
if(isalpha(mat[i][j]))
printf("%c",mat[i][j]);
else
goto ext;
}
}
ext:
getch();
}
output:
I try Carry out this code. But I not understanding well in C + +
ReplyDeletecan you help me and get this source code in c# for me please