Question

C Programming Question

Hi, I have the following code and in my submission I'm supposed to only include function definitions (i.e. implementations) in the file. However, I'm not NOT required to write the main, struct definitions and function prototypes.

Could someone help me fix this code?

#include<stdio.h> #1 nclude<stdlib.h> #include <string.h> struct ip address [ int octet_1; int octet_2; int octet_3; int octet 4; 3i typedef struct ip_address ip address_t void print_ip_address(ip_address_t ip1)( printf "%d.%d.%d . %d" ip1 . octet-1,ip1 . octet-2,ip1.octet.3 , ip1.octet-4); ,

$addr_arry[cnt] ip; cnt++i else printfCInvalid Input \n); elset printfCInvalid Input \n); return cnt; void print_same_subn$

$printf(please enter How many Ip Address \n); scanf(%d, &lenvalue); int ent -get-valtd.ip.odresss(oddr-arry, lenvalue): pr$

Text Version:

#include<stdio.h>

#include<stdlib.h>

#include <string.h>

struct ip_address {


int octet_1;

int octet_2;

int octet_3;

int octet_4;



};


    typedef struct ip_address ip_address_t;
    void print_ip_address(ip_address_t ip1){

    printf("%d.%d.%d.%d", 
    ip1.octet_1,ip1.octet_2,ip1.octet_3,ip1.octet_4);
    }

int is_valid(ip_address_t ip1){

    if(ip1.octet_1 < 0 && ip1.octet_1 > 255){
    return 0;
    }

    if(ip1.octet_2 < 0 && ip1.octet_2 > 255){
    return 0;
    }

    if(ip1.octet_3 < 0 && ip1.octet_3 > 255){
    return 0;
    }

    if(ip1.octet_4 < 0 && ip1.octet_4 > 255){
    return 0;
    }

return 1;
    }

int isequal(ip_address_t ip1, ip_address_t ip2){

    if(ip1.octet_1 != ip2.octet_1){
    return 0;
    }

    if(ip1.octet_2 != ip2.octet_2){
    return 0;
    }

    if(ip1.octet_3 != ip2.octet_3){
    return 0;
    }

    if(ip1.octet_4 != ip2.octet_4){
    return 0;
    }

return 1;

}

int issame_subnet(ip_address_t ip1, ip_address_t ip2){

    if(ip1.octet_1 != ip2.octet_1){
    return 0;
    }

    if(ip1.octet_2 != ip2.octet_2){
    return 0;
    }

    if(ip1.octet_3 != ip2.octet_3){
    return 0;
    }

return 1;

}

int get_valid_ip_addresss(ip_address_t addr_arry[], int addr_arry_len){

int cnt = 0;
int i;
    for(i=0; i<addr_arry_len; i++){
    char input[50];
    scanf("%s", input);

    if(!strcmp(input, "-1.-1.-1.-1")){

    return cnt;
    }

char *splitvalue = strtok(input, ".");

int size = 0;

int a[4];

    while(splitvalue != NULL){
    a[size] = atoi(splitvalue);
    splitvalue = strtok(NULL,".");
    size++;

}

if(size == 4){

    ip_address_t ip;
    ip.octet_1 = a[0];
    ip.octet_2 = a[1];
    ip.octet_3 = a[2];
    ip.octet_4 = a[3];

if(is_valid(ip)){

    addr_arry[cnt] = ip;

    cnt++;

}

    else
    printf("Invalid Input \n");

}

else{
printf("Invalid Input \n");

}

}

return cnt;

}

void print_same_subnet(const ip_address_t addr_arry[], int addr_arry_len){

int arr1[addr_arry_len];
int i;
    for(i=0; i<addr_arry_len; i++){

    arr1[i] = 1;

    }

int j = 0;

    for(i=0; i<addr_arry_len && j<addr_arry_len; i++){
    ip_address_t ip1 = addr_arry[i];

    if(arr1[i] == 1){
    print_ip_address(ip1);

    arr1[i] = 0;

}

    for(j = i+1; j <addr_arry_len; j++ ){
    if(arr1[j] == 1){

    ip_address_t ip2 = addr_arry[j];
    if(issame_subnet(ip1,ip2)){

    printf(",");

    print_ip_address(ip2);

    arr1[j] = 0;

}

}

}

printf("\n");

}

}

int main(){

ip_address_t addr_arry[10];

int lenvalue = 5;

    printf("please enter How many Ip Address \n");
    scanf("%d", &lenvalue);

int cnt = get_valid_ip_addresss(addr_arry, lenvalue);

    printf("Valid Ip Address count is: %d \n", cnt);

    printf("Same Subnet ip_addressess Are \n");

    print_same_subnet(addr_arry, cnt);

return 0;

}

Answer 1

//C code doesn't work without main, but since you have requested for only the function definitions, writing them below::

//1. Function to check if the IP address is valid

int is_valid(ip_address_t ip1){

if(ip1.octet_1 < 0 && ip1.octet_1 > 255){
return 0;
}

if(ip1.octet_2 < 0 && ip1.octet_2 > 255){
return 0;
}

if(ip1.octet_3 < 0 && ip1.octet_3 > 255){
return 0;
}

if(ip1.octet_4 < 0 && ip1.octet_4 > 255){
return 0;
}

return 1;
}

//2.Function to check if two IP addresses are equal:

int isequal(ip_address_t ip1, ip_address_t ip2){

if(ip1.octet_1 != ip2.octet_1){
return 0;
}

if(ip1.octet_2 != ip2.octet_2){
return 0;
}

if(ip1.octet_3 != ip2.octet_3){
return 0;
}

if(ip1.octet_4 != ip2.octet_4){
return 0;
}

return 1;

}

//3.Function to check if subnets of two IP addresses are same

int issame_subnet(ip_address_t ip1, ip_address_t ip2){

if(ip1.octet_1 != ip2.octet_1){
return 0;
}

if(ip1.octet_2 != ip2.octet_2){
return 0;
}

if(ip1.octet_3 != ip2.octet_3){
return 0;
}

return 1;

}

//4.Function to get valiid IP addresses, based on the length passed in parameters:

int get_valid_ip_addresss(ip_address_t addr_arry[], int addr_arry_len){

int cnt = 0;
int i;
for(i=0; i<addr_arry_len; i++){
char input[50];
printf("Enter:");
scanf("%s", input);

if(!strcmp(input, "-1.-1.-1.-1")){

return cnt;
}

char *splitvalue = strtok(input, ".");

int size = 0;

int a[4];

while(splitvalue != NULL){
a[size] = atoi(splitvalue);
splitvalue = strtok(NULL,".");
size++;

}

if(size == 4){

ip_address_t ip;
ip.octet_1 = a[0];
ip.octet_2 = a[1];
ip.octet_3 = a[2];
ip.octet_4 = a[3];

if(is_valid(ip)){

addr_arry[cnt] = ip;

cnt++;

}

else
printf("Invalid Input \n");

}

else{
printf("Invalid Input \n");

}

}

return cnt;

}

//5.Function to print same IP addresses one by one

void print_same_subnet(const ip_address_t addr_arry[], int addr_arry_len){

int arr1[addr_arry_len];
int i;
for(i=0; i<addr_arry_len; i++){

arr1[i] = 1;

}

int j = 0;

for(i=0; i<addr_arry_len && j<addr_arry_len; i++){
ip_address_t ip1 = addr_arry[i];

if(arr1[i] == 1){
print_ip_address(ip1);

arr1[i] = 0;

}

for(j = i+1; j <addr_arry_len; j++ ){
if(arr1[j] == 1){

ip_address_t ip2 = addr_arry[j];
if(issame_subnet(ip1,ip2)){

printf(",");

print_ip_address(ip2);

arr1[j] = 0;

}

}

}

printf("\n");

}

}

//Above are the definitions of 5 functions used in the code