字符串去空格

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>


int trimSpace(char *inbuf, char *outbuf)
{
    char *tmpBuf = inbuf;
    
    while(*tmpBuf!='')
    {
        if ((*tmpBuf) != ' ')
                     
            *outbuf++ = *tmpBuf;
        }
        tmpBuf++;
    }
    *outbuf = '';
}
int main()
{
    char *inbuf;
    char *outbuf = NULL;
    outbuf =(char *)malloc(100);
    inbuf = "  abcdefg   ";
    
    trimSpace(inbuf, outbuf);
    printf("trimSpace后outbuf:%s
", outbuf);
    system("pause");
    return 0;
}

 去除两端的空格（两头堵）：

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

void getCount2(char *str, int *pCount)
{
    int nCount = 0;
    char *p = str;
    int i, j = 0;
    i = 0;
    j = strlen(str)-1;
    
    if (str == NULL)
    {
        return -1;
    }
    while (isspace(p[i])&&p[i]!='')
    {
        i++;
    }
    while (isspace(p[j]) && p[j] != '')
    {
        j--;
    }

    nCount = j - i + 1;
    *pCount = nCount;
}

int main()
{
    char *str ="   abcdefg  ";
    int pCount =0;
    getCount2(str, &pCount);
    printf("字符串%s的长度为（不包括空格）：%d
",str,pCount);
    system("pause");
    return 0;
}