konverzije

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

#define LEN 10

char* intBinToString(int x);
int stringBinToInt(char* s);

int lengthBin(int x);
char* intBinToString1(int x);
int stringBinToInt1(char* s);

int main()
{
    int broj, x;
    char *s=NULL;

    printf("Broj: ");
    scanf("%d",&broj);

    s = intBinToString(broj);
    printf("Binarni zapis broja: %s",s);

    x = stringBinToInt(s);
    printf("\nx = %d",x);

    s = intBinToString1(broj);
    printf("\n\nBinarni zapis broja: %s",s);

    x = stringBinToInt1(s);
    printf("\n\nx = %d",x);


    return 0;
}

char* intBinToString(int x)
{
    char* s = (char* )malloc(LEN * sizeof(char));
    char *poc = s, *kraj=s, temp;

    while(x){
        if(x%2) *kraj='1';
        else *kraj='0';

        kraj++;
        x/=2;
    }
    *kraj=NULL;

    kraj--;
    while(kraj>poc){
        temp=*kraj;
        *kraj=*poc;
        *poc=temp;

        kraj--;
        poc++;
    }

    return s;
}

int stringBinToInt(char* s)
{
    int broj=0;

    while(*s){
        broj=2*broj+(*s-'0');
        s++;
    }

    return broj;
}

int lengthBin(int x)
{
    int br=0;

    while(x){
        br++;
        x>>=1;
    }

    return br;
}

char* intBinToString1(int x)
{
    char* s = (char* )malloc(LEN * sizeof(char));
    char* poc = s;
    int len = lengthBin(x), i;

    for(i=len;i>=0;i--){
        *poc = ((x & (1<<i))>>i)+'0';
        poc++;
    }
    *poc=NULL;

    return s;
}

int stringBinToInt1(char* s)
{
    int x=0;

    while(*s){
        x<<=1;
        x|=(*s-'0');
        s++;
    }

    return x;
}