void ReadScore(STU stu[], int n, int m)
{
	int i, j;
	printf("Input student's ID, name and score:\n");
    /* ---------- begain ---------- */
    for(i=0;i<n;i++)
    {scanf("%ld%s",&stu[i].num,stu[i].name);
     for (j=0; j<m; j++)
     scanf("%f",&stu[i].score[j]);
    }

    /* ----------- end ----------- */
}