字符串模型1：打印去掉字符串首尾空格後的字符

#include <stdio.h>
#include <string.h>

/* 有一個字符串開頭或結尾含有n個空格("  helloworld   "), 欲去掉前後空格
 * 返回一個新字符串.
 * 要求1：自己定義一個接口
 * 要求2：編寫測試用例
 * int trim_space(char *inbuf, char *outbuf);
*/
/*函數如下*/
int trim_space(char *inbuf, char *outbuf, int *pcount)
{
    int i = 0, j;       // i指向字符數組第一個字符
    int ncount;
    char *p = inbuf;

    j = strlen(inbuf) - 1;  // j指向最後一個字符

    /*-- 字符串去掉首尾空格後的長度 --*/
    while ( isspace(inbuf[i]) )
        i++;
    while ( isspace(inbuf[j]) )
        j--;
    ncount = j - i + 1;
    *pcount = ncount;
    /*-------------------------- */

    strncpy(outbuf, p+i, ncount);  // 把去掉空格後的字符串複製到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;
}