Play fair cipher

Play fair cipher

• 1.
  PlayFair Cipher Codeby Khawar: #include <iostream> usingnamespace std; intmain() { inti,j,x,r,n,z,c1,c2,p;c1=0; char a2[25]={'a','b','c','d','e','f','g','h','i','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}; char key[50],aa[100]; cout<<"write yourcyphertextheren"; cin.getline(aa,100); cout<<"enteryourkeyheren"; cin.getline(key,50); intll=strlen(key); char a[5][5]; for(i=0;i<5;i++) { for(j=0;j<5;j++) { c2=0; if(c1<ll) { for(p=0;p<25;p++) { if(key[c1]==a2[p])
• 2.
  { a[i][j]=key[c1]; c1++;c2=1; a2[p]='1';break; } if(p==24&&c2!=1) { p=0;c1++; } } } else { for(p=0;p<25;p++) { if(a2[p]!='1') { a[i][j]=a2[p];a2[p]='1';break; } } } } } cout<<"n"; intl=strlen(aa); intro1,co1,ro2,co2; x=0; while(x<l) { for(i=0;i<5;i++)
• 3.
  { for(j=0;j<5;j++) { if(aa[x]==a[i][j]){ro1=i;co1=j;} if(aa[x+1]==a[i][j]){ro2=i;co2=j;} } } if(ro1==ro2) { if(co1>0) { aa[x]=a[ro1][co1-1]; } if(co2>0) { aa[x+1]=a[ro2][co2-1]; } if(co1==0) { aa[x]=a[ro1][4]; } if(co2==0) { aa[x+1]=a[ro2][4]; } } else if(co1==co2) {
• 4.
  if(ro1>0) { aa[x]=a[ro1-1][co1]; } if(ro2>0) { aa[x+1]=a[ro2-1][co2]; } if(ro1==0) { aa[x]=a[4][co1]; } if(ro2==0) { aa[x+1]=a[4][co2]; } } else { aa[x]=a[ro1][co2]; aa[x+1]=a[ro2][co1]; } x=x+2; } cout<<"plantextis= "<<aa<<"n"; }
• 5.
  Thanks: