C语言字符串快速压缩算法代码

#include <stdio.h> 
#include <string.h> 
#include <stdlib.h> 
int main() 
{ 
    char str[100] = {'\0'}; 
    char res[100] = {'\0'}; 
    scanf("%s",str); 
    int length = strlen(str); 
    int i=0, j=0, k=0; 
    int count = 0; 
    do 
    { 
        if(i < length && str[i++] == str[j]) 
            count++; 
        if(str[i] != str[j]) 
        { 
            if(count <= 1) 
                res[k++] = str[j]; 
            else 
            { 
                if(count > 1) 
                { 
                    char temp[10] = {'\0'}; 
                    itoa(count,temp,10); 
                    strcpy(res+k,temp); 
                    k+=strlen(temp); 
                    res[k++] = str[j]; 
                } 
            } 
            j = i; 
            count = 0; 
        } 
    }while(i<length); 
    res[k] = '\0'; 
    printf("The result is : %s\n",res); 
    return 0; 
}