（两头堵）去除两边空格

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#define _CRT_SECURE_NO_WARNINGS#include <stdio.h>#include <stdlib.h>#include <string.h>void trimSpace(char **str){if (str == NULL){return;}char *tmp = *str;if (tmp == NULL){return;}char *left = tmp;char *right = tmp + strlen(tmp) - 1;while (*left == ' '){left++;}while (*right == ' ' && right != tmp){right--;}if (right - left + 1 <= 0){*str = NULL;return;;}if (*(right + 1) != '\0'){*(right + 1) = '\0';}*str = left;}int count_space(char *str){if (NULL == str){return -1;}char *left = str;char *right = str + strlen(str) - 1;while (*left == ' '){left++;}while (*right == ' ' && right != str){right--;}if (right - left + 1 < 0){return 0;}return right - left + 1;}void test(){char *str = (char *)malloc(100);if (str == NULL){return;}memset(str, 0, 100);strcpy(str, "        dsss    ");int count = 0;count = count_space(str);trimSpace(&str);printf("%d\n", count);if (str == NULL){printf("内容为空\n");}else{printf("%s\n", str);}}void main(){test();system("pause");}

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