C 语言实例 - 字符转 ASCII 码

//#include "stdafx.h"//If the vc++6.0, with this line.

#include "stdio.h"

int main(void){

    char *a[33]={"NUL(null)","SOH(strt of heading)","STX(start of text)",

        "ETX(end of text)","EOT(end of transmission)","ENQ(enquiry)",

        "ACK(acknowledge)","BEL(bell)","BS(backspace)",

        "TAB(horizonfal tab)","LF(NL line feed, new_line)","VT(vertical tab)",

        "FF(NP form feed, new page)","CR(carriage return)","SO(shift out)",

        "SI(shift in)","DLE(data link escape)","CC1(device control 1)",

        "DC2(device control 2)","DC3(device control 3)","DC4(device control 4)",

        "NAD(negative acknowledge)","SYN(synchronous idle)","ETB(end of trans, block)",

        "CAN(cancel)","EM(end of medium)","SUB(substitute)",

        "ESC(escage)","FS(file separator)","GS(group separator)",

        "RS(record separator)","US(unit separator)","SPACE"},

        i;

    printf("Dec\tHex\tChar\n");

    for(i=0;i<33;printf("%d\t%X\t%s\n",i++,i,a[i]));

    for(;i<127;printf("%d\t%X\t%c\n",i++,i,i));

    printf("%d\t%X\t%s\n",i,i,"DEL");

    return 0;

}

本实例通过一些更改可以一次读取长字符，并一个一个显示 ASCII 码。

#include <stdio.h>
#define MAX_STRING_LENGTH 65535 // 最大字符串长度

int main(){
  char s[MAX_STRING_LENGTH];
  printf("请输入长度小于 %d 的任意字符：",MAX_STRING_LENGTH);
  scanf("%s",s);    // 读取字符串。
  for(int i = 0; s[i]; i++){
    printf("%c的ASCII:%d\t",s[i],s[i]);
  }
}