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#include <stdio.h>
void main()
{
int b[400],i=0;
for(i=0;i<400;i++)
{
b[i] = i;
}
printf("%d \n",b[-1]); //随机值
printf("%d \n",b[-0]); //0
printf("%d \n",b[1]); //1
printf("%d \n",b[2]); //2
b[-1] = -1;
printf("%d \n",b[-1]); //-1
system("pause");
}
#include <stdio.h>
#include <string.h>
#include "stdio.h"
void main(){
int b[400],i=2;
printf("%3d\n",b[i-3]);
printf("%3d\n",b[i]);
printf("%3d\n",b[i+1]);
printf("%3d",b[i+2]);
}