字符串模型1：打印去掉字符串首尾空格后的字符

#include <stdio.h>#include <string.h>/* 有一个字符串开头或结尾含有n个空格("  helloworld   "), 欲去掉前后空格 * 返回一个新字符串. * 要求1：自己定义一个接口 * 要求2：编写测试用例 * int trim_space(char *inbuf, char *outbuf);*//*函数如下*/int trim_space(char *inbuf, char *outbuf, int *pcount){    int i = 0, j;       // i指向字符数组第一个字符    int ncount;    char *p = inbuf;    j = strlen(inbuf) - 1;  // j指向最后一个字符    /*-- 字符串去掉首尾空格后的长度 --*/    while ( isspace(inbuf[i]) )        i++;    while ( isspace(inbuf[j]) )        j--;    ncount = j - i + 1;    *pcount = ncount;    /*-------------------------- */    strncpy(outbuf, p+i, ncount);  // 把去掉空格后的字符串复制到outbuf中    return 0;}int trim_space2(char *inbuf, char *outbuf){}/*int main1(void){    char *inbuf = "   helloworld   ";    char outbuf[100] = {0};    printf("before call of func inbuf=%s\n", inbuf);    trim_space(inbuf, outbuf);    printf("after call of func inbuf=%s\n", outbuf);    return 0;}*/int main(void){    char *inbuf = "   helloworld   ";    char outbuf[100] = {0};     int count = 0;    trim_space(inbuf, outbuf, &count);    printf("count=%d\n", count);    printf("outbuf=%s\n", outbuf);    printf("strlen(outbuf)=%d\n", strlen(outbuf));    return 0;}