To implement RSA encryption-decryption in C. (WITH OUTPUT IMAGE)

#include<stdio.h>

#include<conio.h>

#include<math.h>

int mod(int a,int b,int c)

{

   double x=1,div1,div,inte;

   int i;

   float mod1;

   for(i=1;i<=b;i++)

   {x=x*a;}

// printf("\n Exponent is %lf",x);

 div1=x/c;

 div=modf(div1,&inte);

// printf("\n devided %lf",div1);

//printf("\n div %lf",div);

 mod1=div*c;

// mod1=ceill(mod1);

 return mod1;

}

void main()

{

int i,q,p,e,d,n,c[6],dc[6],m[6];

clrscr();

printf("Enter prime number p::");

scanf("%d",&p);

printf("\nEnter prime number q::");

scanf("%d",&q);

printf("\n Enter e::");

scanf("%d",&e);

//printf("%d",xa);

printf("\n Enter d::");

scanf("%d",&d);

n=p*q;

printf("\n ENTER PlAIN TEXT::");

for(i=0;i<6;i++)

scanf("%d",&m[i]);

//ENCRYPTION.

for(i=0;i<6;i++)

{c[i]=mod(m[i],e,n);

printf("\n::::::CIPHER TEXT is::::%d",c[i]);

}

//DECRYPTION.

for(i=0;i<6;i++)

{dc[i]=mod(c[i],d,n);

printf("\n:::::DECRYPTED TEXT is::%d",dc[i]);

}

getch();

}

OUTPUT: