Question

How to convert int to IP address in C

Answer 1

#include <stdio.h>
#include <arpa/inet.h>

int main()
{
    uint32_t ip = 2912054386;
    
    struct in_addr ip_address;
    ip_address.s_addr = ip;
    
    printf("The IP address is %s\n", inet_ntoa(ip_address));
    
    return 0;
}



/*
run:

The IP address is 114.108.146.173

*/

 

70+ SQL courses for beginners and professionals

Answer 2

#include <stdio.h>

void get_ip_address(unsigned char bytes[], unsigned int ip) {
    bytes[0] = ip & 0xFF;
    bytes[1] = (ip >> 8) & 0xFF;
    bytes[2] = (ip >> 16) & 0xFF;
    bytes[3] = (ip >> 24) & 0xFF;   
}

int main()
{
    unsigned int ip = 2912054386;
    unsigned char bytes[4];
    
    get_ip_address(bytes, ip);
    
    printf("The IP address is %d.%d.%d.%d\n", bytes[0], bytes[1], bytes[2], bytes[3]);

    return 0;
}



/*
run:

The IP address is 114.108.146.173

*/

 

70+ SQL courses for beginners and professionals

Answer 3

#include <stdio.h>
 
typedef union IP {
    unsigned int ip;
    struct {
        unsigned char a;
        unsigned char b;
        unsigned char c;
        unsigned char d;
    } ips;
} IP;
 
int main()
{
    IP ip;
    ip.ip = 2912054386;
 
    printf("The IP address is %d.%d.%d.%d\n", ip.ips.a, ip.ips.b, ip.ips.c, ip.ips.d);
 
    return 0;
}
 
 
 
/*
run:
 
The IP address is 114.108.146.173
 
*/

 

70+ SQL courses for beginners and professionals

Answer 4

#include <stdio.h>

int main()
{
    unsigned int ip = 2912054386;

    printf("The IP address is %d.%d.%d.%d",
          ip & 0xFF,
          (ip >> 8) & 0xFF,
          (ip >> 16) & 0xFF,
          (ip >> 24) & 0xFF);

    return 0;
}



/*
run:

The IP address is 114.108.146.173

*/

 

70+ SQL courses for beginners and professionals