Question

How to convert a char to binary in C

Answer 1

#include <stdio.h>
 
int main(void)
{
    char ch = 'a';
    int i;
     
    for (i = 7; i >= 0; i--)
        printf("%i", (ch >> i) & 1);
        
    return 0;
}
 
/*
 
run:
 
01100001

*/

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Answer 2

#include <stdio.h>
 
int main(void)
{
    char ch = 'a';
    int i, bits[8];
    
    for (i = 0; i < 8; i++) 
        bits[i] = (ch >> i) & 1;
        
    for (i = 7; i >= 0; i--) 
        printf("%d", bits[i]);
    
    return 0;
}
 
/*
 
run:
 
01100001

*/

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Answer 3

#include <stdio.h>
 
int main(void)
{
    char ch = 'a';
    int i;
        
    for (i = 7; i >= 0; i--)
        putchar( (ch & (1 << i)) ? '1' : '0' );
        
    return 0;
}
 
/*
 
run:
 
01100001

*/ 

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Answer 4

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    char ch = 'a', bits[9];
        
    // char*  itoa(int value, char * str, int base);
    itoa(ch, bits, 2);
    printf("%s", bits);
        
    return 0;
}
 
/*
 
run:
 
1100001

*/

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