Question

How to Initialise byte array with decimal, octal and hexadecimal numbers in C

Answer 1

#include <stdio.h>
 
int main()
{
    unsigned char arr1[] = {10, 20, 30, 40, 90}; // decimal values
    unsigned char arr2[] = {010, 077, 023, 034, 053};   // octal values 
    unsigned char arr3[] = {0x10, 0xAA, 0x67, 0xAB, 0xFF}; // hexadecimal values        
    
    int size = sizeof(arr1) / sizeof(arr1[0]); 
     
    for (int i = 0; i < size; i++)
        printf("%d ", arr1[i]);
     
    printf("\n");
 
    for (int i=0; i < size; i++)
        printf("%o ", arr2[i]);
     
    printf("\n");
     
    for (int i = 0; i < size; i++)
        printf("%X ", arr3[i]); 
     
    return 0;
}
   
   
   
     
/*
run:
     
10 20 30 40 90 
10 77 23 34 53 
10 AA 67 AB FF 
  
*/

 

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