快速排序：莫名其妙，随机错误

Question

#include <stdio.h> #include <stdlib.h> int numbers[101],size,i; void C_sort(int L,int R){     int L_arrow,R_arrow,box,temp;     if(L>R){         return;     }     box=numbers[L];     L_arrow=L;R_arrow=R;     printf("R_arrow=%d\n",R_arrow);     for(i=1;i<=size-1;i++){         if(i==L_arrow)printf("(%d) ",numbers[i]);         else if(i==R_arrow)printf("[%d] ",numbers[i]);         else printf("%d ",numbers[i]);     }     for(i=0;i<=size-1;i++)printf("%d ",numbers[i]);     printf("\n");     while(L_arrow!=R_arrow){         while(numbers[R_arrow]>=box&&L_arrow<R_arrow){             R_arrow--;             printf("R_arrow=%d\n",R_arrow);             for(i=0;i<=size-1;i++)printf("%d ",numbers[i]);         }         while(numbers[L_arrow]<=box&&L_arrow<R_arrow){             L_arrow++;             for(i=0;i<=size-1;i++)printf("%d ",numbers[i]);         }         if(L_arrow<R_arrow){             temp=numbers[R_arrow];             numbers[R_arrow]=numbers[L_arrow];             numbers[L_arrow]=temp;             for(i=0;i<=size-1;i++)printf("%d ",numbers[i]);         }         /*for(i=1;i<=size-1;i++){         if(i==L_arrow)printf("(%d) ",numbers[i]);         else if(i==R_arrow)printf("[%d] ",numbers[i]);         else printf("%d ",numbers[i]);         }*/     //printf("\n");     }     numbers[L]=numbers[L_arrow];     numbers[L_arrow]=box;     for(i=1;i<=size-1;i++)printf("%d ",numbers[i]);     printf("\n");     C_sort(L,L_arrow-1);     C_sort(L_arrow+1,R); } int main() {     int i;     scanf("%d",&size);     for(i=0;i<=size-1;i++)scanf("%d",&numbers[i]);     //for(i=0;i<=size-1;i++)printf("%d ",numbers[i]);//测试代码，此时输出已不正常     C_sort(0,size-1);     for(i=1;i<=size-1;i++)printf("%d ",numbers[i]);     system("pause");     return 0; }有一些是测试代码显示过程。编译通过，然后结果明显错误，从过程来看也没有R_arrow的踪迹。Why？错误太随机了！！