hex to ascii

#include <stdio.h>

int main(void)
{
    //dec
    char a = 64;
    char b[3];
    unsigned int x;
    
    //b = "64"
    sprintf(b,"%d", a);
    //x = 0x64, hex
    sscanf(b, "%2x", &x);

    printf("a = %d\t, x = %c\n", a, x);

    return 0;
}