#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;}