C source code for converting an integer to binary.

char *int2bin(int a)
{
char *str,*tmp;
int cnt = 31;
str = (char *) malloc(33); /*32 + 1 , becoz its a 32 bit bin number*/
tmp = str;
while ( cnt > -1 ){
str[cnt]= '0';
cnt --;
}
cnt = 31; printf("\n");
while (a > 0){

if (a%2==1){
str[cnt] = '1';
printf(" 1");
}
else
printf(" 0");
cnt--;
a = a/2 ;
}
return tmp;

}