Question

How to convert octal to hexadecimal in C++

Answer 1

#include <iostream> 
#include <cmath>

int main()
{
    int octal = 375, reminder, i = 0, decimal = 0, pos = 0;
    char hex[32];

    // Octal to decimal
    while(octal!=0) {
        decimal = decimal + (octal % 10) * pow(8, pos);
        pos++;
        octal = octal / 10;
    }
    // Decimal to hexadecimal
    while(decimal!=0) {
        reminder = decimal % 16;
        if(reminder<10)
            hex[i++] = reminder + 48; // 48 = Ascii -> 0
        else
            hex[i++] = reminder + 55; //55 = Ascii -> 7
        decimal /= 16;
    }
    for (int j = i - 1; j >= 0; j--)
        std::cout << hex[j];

    return 0;
}




/*
run:

FD

*/

 

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