C语言二进制位运算实例 C语言函数指针实例 C语言使用位操作显示二进制 C语言二进制位运算实例 /* binbit.c -- using bit operations to display binary */ #include <stdio.h> #include <limits.h> // for CHAR_BIT, # of bits per char char * itobs(int, char *); void show_bstr(const char *); int main(void) { char bin_str[CHAR_BIT * sizeof(int) + 1]; int number; puts("Enter integers and see them in binary."); puts("Non-numeric input terminates program."); while (scanf("%d", &number) == 1) { itobs(number,bin_str); printf("%d is ", number); show_bstr(bin_str); putchar('\n'); } puts("Bye!"); return 0; } char * itobs(int n, char * ps) { int i; const static int size = CHAR_BIT * sizeof(int); for (i = size - 1; i >= 0; i--, n >>= 1) ps[i] = (01 & n) + '0'; ps[size] = '\0'; return ps; } /* show binary string in blocks of 4 */ void show_bstr(const char * str) { int i = 0; while (str[i]) /* not the null character */ { putchar(str[i]); if(++i % 4 == 0 && str[i]) putchar(' '); } } C语言函数指针实例 C语言使用位操作显示二进制