将字符串中多余的空格去掉

#include<stdio.h>
#include<stdlib.h>

int main(void)
{
    char str[100];
    char des[100];

    printf("input a string:");
    gets(str);

    int i = 0;
    int j = 0;
    int blank_count = 0;
    char c = str[0];
    for(i=1; c!=‘\0‘; i++)
    {
        if(c != ‘ ‘)
        {    
            if(blank_count > 0)
            {
                des[j++] = ‘ ‘;
                blank_count = 0;
            }
            des[j++] = c;
        }
        else
        {
            blank_count++;
        }

        c = str[i];
    }

    printf("str:%s\n", str);
    printf("des:%s\n", des);

    return EXIT_SUCCESS;
}