100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
#include <stdio.h>
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#include <conio.h>
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#define CR 0x0d //carriage return
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#define ESC 0x1b //Escape key
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#define TAB 0x09
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#define LF 0x0a //line feed
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#define BACKSPACE 0x08
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#define NULL 0 //Empty character
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#define TRUE 1
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#define FALSE 0
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#define LENGTH 15 //size of the string
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int input(char *string, int length);
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void main()
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{
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char string[LENGTH];
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printf("What is your name?");
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if(!input(string,LENGTH))
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printf("Darn glad to meet you, %s!\n",string);
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else
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printf("\n*** Canceled");
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}
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int input(char *string, int length)
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{
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int done = FALSE;
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int cancel = FALSE;
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int index = 0;
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char ch;
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string[0] = NULL; //init the buffer
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do
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{
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ch = getch();
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/* Check to see whether the buffer is full */
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if (index == length)
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{
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switch(ch)
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{
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case ESC:
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done = TRUE;
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cancel = TRUE;
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break;
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case CR:
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break;
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case BACKSPACE:
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break;
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default:
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ch = NULL;
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break;
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}
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}
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/* Process the keyboard input */
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switch(ch)
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{
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case ESC: //Escape key
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done = TRUE;
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cancel = TRUE;
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break;
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case CR: //Enter key
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putchar(ch);
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putchar(LF);
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string[index] = NULL;
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done = TRUE;
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break;
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case BACKSPACE:
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if(index==0)
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{
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break;
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}
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else
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{
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putchar(ch);
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putchar(' ');
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putchar(ch);
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index--;
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break;
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}
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case NULL:
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break;
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default: //display & store
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putchar(ch);
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index[string] = ch;
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index++;
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break;
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}
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}
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while(!done);
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return(cancel);
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}
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