C语言实现删除字符串首尾的空格，中间的连续空格只留一个，原来字符串顺序不变

Posted 2022-09-03

#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;