Question

How to convert hexadecimal to binary in C

Answer 1

#include <stdio.h>
 
int main()
{
    char hex[16] = "FD";
    int i = 0;
     
    while(hex[i]) {
        switch(hex[i]) {
            case '0':
                printf("0000"); break;
            case '1':
                printf("0001"); break;
            case '2':
                printf("0010"); break;
            case '3':
                printf("0011"); break;
            case '4':
                printf("0100"); break;
            case '5':
                printf("0101"); break;
            case '6':
                printf("0110"); break;
            case '7':
                printf("0111"); break;
            case '8':
                printf("1000"); break;
            case '9':
                printf("1001"); break;
            case 'A':
                printf("1010"); break;
            case 'a':
                printf("1010"); break;
            case 'B':
                printf("1011"); break;
            case 'b':
                printf("1011"); break;
            case 'C':
                printf("1100"); break;
            case 'c':
                printf("1100"); break;
            case 'D':
                printf("1101"); break;
            case 'd':
                printf("1101"); break;
            case 'E':
                printf("1110"); break;
            case 'e':
                printf("1110"); break;
            case 'F':
                printf("1111"); break;
            case 'f':
                printf("1111"); break;
            default:
                printf("Error");
        }
        i++;
    }
 
    return 0;
}
 
 
 
  
/*
run:
      
11111101
 
*/

 

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