/**********************************************
**《Beginning C 4th Edition》Notes codes
** Created by Goopand
** Compiler: gcc 4.7.0
***********************************************/
 
#include <stdio.h>
int main(void)
{ 
  /*八進(jìn)制、十六進(jìn)制整數(shù)的表示*/
  int i1=024;     //八進(jìn)制數(shù)以數(shù)字0開頭
  int i2=0xF0;    //十六進(jìn)制以0x或0X開頭
  printf("[Output]\n");
  printf("八進(jìn)制數(shù)024的十進(jìn)制值為：\t%d\n",i1);
  printf("十六進(jìn)制數(shù)0xF0的十進(jìn)制值為：\t%d\n",i2);
  
  /*浮點(diǎn)型的表示及格式化輸出*/
  double f1=1E1;
  double f2=0.3E1;
  /* %-10.6lf表示輸出長(zhǎng)度共占10位，負(fù)號(hào)表示左對(duì)齊，按照%lf雙精度浮點(diǎn)型輸出，并保留至小數(shù)點(diǎn)后6位 */
  printf("\n[Output]\n");
  printf("%.1f/%.1f = %-10.6lf|\n",f1,f2,f1/f2);   //豎線符"|"用來(lái)標(biāo)明末尾位置
  
  /*常量的定義*/
  const float PI = 3.1415926535898f;
  printf("\n[Output]\n");
  printf("PI is: %.7f\n",PI);
  
  /*研究一下printf()函數(shù)的返回值*/
  char c1='a' , c2='b' ;
  printf("\n[Output]\n");
  printf("測(cè)試printf()函數(shù)的返回值\n");
  printf("%d\n",printf("%d",printf("%c%c",c1,c2))); //printf()函數(shù)的返回值是輸出字符的個(gè)數(shù)
  
  /*字符型的ASCII碼表，包括轉(zhuǎn)義字符*/
  char ch1=0; //初始化為null
  printf("\n[Output]\n");
  printf("Int型和Char型的ASCII編碼對(duì)應(yīng)關(guān)系\n");
  printf("\tInt\tChar\n");
  printf("\t----\t----\n"); 
  for(int i=0;i<128;i++)
  {
    ch1=i;
    printf("\t%d\t%c\n",i,ch1);
  }
  return 0; 
}