1     while true; do  
 2         ./3>4810.in #出数据  
 3         ./1<4810.in>cuo.out #被测程序  
 4         ./2<4810.in>dui.out #正确（暴力）程序  
 5         if diff dui.out cuo.out; then #比较两个输出文件  
 6             printf "AC\n"  #结果相同显示AC  
 7       
 8         elif diff -B -b dui.out cuo.out; then  
 9             printf "PE\n"  
10       
11         else  
12             printf "WA\n" #结果不同显示WA，并退出  
13             exit 0  
14         fi  
15     done