Converting an int into a 4 byte char array (C)

Question

Hey, I\'m looking to convert a int that is inputed by the user into 4 bytes, that I am assigning to a character array. How can this be done?

Example:

Convert

Answer 1

Do you want to address the individual bytes of a 32-bit int? One possible method is a union:

union
{
    unsigned int integer;
    unsigned char byte[4];
} foo;

int main()
{
    foo.integer = 123456789;
    printf("%u %u %u %u\n", foo.byte[3], foo.byte[2], foo.byte[1], foo.byte[0]);
}

Note: corrected the printf to reflect unsigned values.