C examples for Data Type:int
Convert integer to binary
#include <stdio.h> #include <limits.h> #define MAXLINE 1000/*from w ww.j a va 2s.com*/ void itob(int n, char s[], int b); void reverse(char s[]); int main(void) { char s[MAXLINE]; itob(INT_MIN, s, 16); printf("%d in base %d is %s.\n", INT_MIN, 16, s); itob(123, s, 10); printf("%d in base %d is %s.\n", 123, 10, s); itob(-321, s, 5); printf("%d in base %d is %s.\n", -321, 5, s); return 0; } void itob(int n, char s[], int b) { int i, sign, remainder; char bases[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; if (b < 2 || b > 36) return; sign = n; i = 0; do { remainder = n % b; s[i++] = ((sign < 0) ? -remainder : remainder) + '0'; } while (n /= b); if (sign < 0) s[i++] = '-'; s[i] = '\0'; reverse(s); } void reverse(char s[]) { int i, j; int tmp; for (j = 0; s[j] != '\0'; ++j) ; --j; for (i = 0; i < j; ++i, --j) { tmp = s[i]; s[i] = s[j]; s[j] = tmp; } }