"C Language and Programming" Project 1-36-3: Eliminate extraneous spaces

Problem Description: Enter a word from the keyboard until you press ENTER, the characters are output as is, but only one space is output if there is more than one space in a row.
For example, input: I am a teacher., output I am a teacher.

Author's code:

1#include"stdafx.h"2 3 intMain ()4 {5     CharC' /'), M (' /');6 7      Do8     {9c =GetChar ();Ten         if(M = =' ') && (c = =' ')) One         { APutchar ('\b'); -         } - Putchar (c); them =C; -  -} while(c! ='\ n'); -  +     return 0; -}

The Teacher's code:

1#include <stdio.h>2 intMain ()3 {  4     CharC, frontisspace=0;//Frontisspace used to memorize whether the preceding symbol is a space, a space, a value of 1, not a space, 05      while((C=getchar ())! ='\ n')  6     {  7         if(c!=' ')  8         {  9Frontisspace=0;//after reading the next character, the current character is the next so-called previous, its value is not a space, so the assignment is 0Ten Putchar (c);  One         }   A         Else if(frontisspace==0)//If the previous is not a space, the current space is to be output -         {   -Putchar (c);//the output is a space theFrontisspace=1;//after reading the next character, you need to know that the current character, that is, the next so-called previous, its value is a space, so the assignment is 1 -         }   -     }   -     return 0;  +}

Feelings:

It is difficult to think of this problem for the first time. This time can write "pseudo-code" or draw a flowchart, not too much trouble, in fact, can greatly improve efficiency . For example, before writing the code, you can write a pseudo-code:

Input character "Use intermediate variables to determine if the previous character is space"

1. Yes: output backspace

2. No: output character (data processing)

"Store character in intermediate variable" returns a loop

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"C Language and Programming" Project 1-36-3: Eliminate extraneous spaces