主要语句如下：
FILE *fin;
int arr1[3],arr2[3];
int i=3;
if ( (fin = fopen("a.in","r") ) == NULL ) {
printf("\007Cann't open input file a.in ");
exit(0);
};
for (i=0;i<3;i++)
fscanf(fin,"%d %d", &arr1[i], &arr2[i]);
fclose(fin);
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