[转]关于yum命令的详解

/**
*求一字符串所有字串的组合
*/
#include <stdio.h>
#include <string.h>

void str_combine(char src[],char out[], int leng, int rec, int start)
{
int i;
for(i=start;i<leng;i++){
out[rec]=src[i];
out[rec+1]='\0';
printf("%s ",out);
if(i<leng-1)
str_combine(src,out,leng,rec+1,i+1);
}
}
int main()
{
char src[] = "hart";
int leng = strlen(src);
char out[sizeof(src)]={0};
str_combine(src,out,leng,0,0);
printf("\n");
return 0;
}