Question

How to convert hexadecimal to binary in C++

Answer 1

#include <iostream>

int main()
{
    char hex[16] = "FD";
    int i = 0;
    
    while(hex[i]) {
        switch(hex[i]) {
            case '0': std::cout << "0000"; break;
            case '1': std::cout << "0001"; break;
            case '2': std::cout << "0010"; break;
            case '3': std::cout << "0011"; break;
            case '4': std::cout << "0100"; break;
            case '5': std::cout << "0101"; break;
            case '6': std::cout << "0110"; break;
            case '7': std::cout << "0111"; break;
            case '8': std::cout << "1000"; break;
            case '9': std::cout << "1001"; break;
            case 'A': std::cout << "1010"; break;
            case 'B': std::cout << "1011"; break;
            case 'C': std::cout << "1100"; break;
            case 'D': std::cout << "1101"; break;
            case 'E': std::cout << "1110"; break;
            case 'F': std::cout << "1111"; break;
            case 'a': std::cout << "1010"; break;
            case 'b': std::cout << "1011"; break;
            case 'c': std::cout << "1100"; break;
            case 'd': std::cout << "1101"; break;
            case 'e': std::cout << "1110"; break;
            case 'f': std::cout << "1111"; break;
            default:  
                std::cout << "Error";
        }
        i++;
    }

    return 0;
}



 
/*
run:
     
11111101

*/

 

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