#include<stdio.h>
#include<string.h>
char * deblank(char * str)
{
char * left = str;//前面的指针，负责赋值
char * right = str;//后面寻找非空格字符的指针
while (*right)//截至字符串完
{
if (*right != ‘ ‘)
{
if (left<right)
{
*left = *right;//赋值
}
left++;
}
if (*right == ‘ ‘&&*(right + 1) != ‘ ‘)//寻找到下一个单词时，对left的操作
{
*left = ‘ ‘;
left++;
}
right++;
}
*left = ‘\0‘;
return *str != ‘ ‘ ?str:(str + 1);//防止首单词之前有空格现象
}
int main()
{
char str[] = " as adadq k ";
char *a = deblank(str);
int i;
for (i = 0; i < strlen(a); i++)
{
printf("%c",*(a+i));//输出流
}
return 0;
}
原文地址：https://blog.51cto.com/14233078/2433103