C Program To Generate IP Addresses (Internet Protocol IPv4 & IPv6 ) Using For Loop

Problem :- Write a C Program To Generate IP Addresses (Internet Protocol IPv4 & IPv6 ) Using For Loop .

Logic :- Logic is very simple first print random Number so i use rand() Function But always shows same value if you run your code again and again it shows same or repeat Output that's why i use srand() .

so for print IPv4 we need to print multiple of 4 random number cause we need output in this format 

IPv4 :- What is IPv4 Format ?

64.92.8.122 This is a IPv4 Format or Number from 0 to 255 or you can say 0.0.0.0 to 255.255.255.255 Below Code is Printing a IPv4 .

srand(time(NULL));

for(i=0;i<no;i++)

 {

for(j=0;j<4;j++)

{

cnt=rand()%255;

printf("%d",cnt);

if(j<3)

printf(".");

}

printf("\n");

}

IPv6 :- What is IPv6 Format ?

5677.a66c.4410.cc07.8487.8a9a.bd83.7e05 This is a IPv6 Format or we also use hexadecimal Number IPv6 thats a reason IPv6 is More Secure Than IPv4 .Below Code For IPv6 But we also Use A Character array See the Full Code .

srand(time(NULL));

for(i=0;i<no;i++)

{

for(j=0;j<8;j++)

{

for(k=0;k<4;k++)

{

ch=str[rand()%16];

printf("%c",ch);

}

if(j<7)

printf(".");

}

printf("\n");

}

Try Yourself C Program To Print A Calendar By Taking Input From User Using Loop

Solution :-

#include<stdio.h>

#include<string.h>

#include<math.h>

void main()

{

  //Ghanendra Yadav

    int i,j,k,dig,no,nu,cnt=0;

    char str[] ={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};

    char ch;

    

    printf("\nEnter How Many IP Addresses You Want To Print :");

    scanf("%d",&no);

printf("\n\nWhat You Want ipv4 Or Ipv6 Enter (4 Or 6) :");

    scanf("%d",&nu);

    

switch(nu)

    {

    case 4:

    srand(time(NULL));

    for(i=0;i<no;i++)

    {

    for(j=0;j<4;j++)

    {

cnt=rand()%255;

printf("%d",cnt);

if(j<3)

printf(".");

}

printf("\n");

}

break;

case 6 :

    srand(time(NULL));

    for(i=0;i<no;i++)

    {

    for(j=0;j<8;j++)

    {

    for(k=0;k<4;k++)

    {

ch=str[rand()%16];

printf("%c",ch);

}

if(j<7)

printf(".");

}

printf("\n");

}

break;

    default :printf("\nEnter ipv Either 4 or 6\n\n");

}

    

    getch();

}

Output:-

IPv4 :-

IPv6 :-