// 函数功能：按学号查找学生成绩并显示查找结果 
void SearchbyNum(STU stu[], int n, int m)
{
	long number;
	int   i, j;
	printf("Input the number you want to search:");
	scanf("%ld", &number);

    /* ---------- begain ---------- */
for(i=0;i<n;i++)
{
	if (stu[i].num==number)
		{
			printf("%ld\t%s\t", stu[i].num, stu[i].name);
			for (j=0; j<m; j++)
			{
				printf("%.0f\t", stu[i].score[j]);
			}
			printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
			return;
		}

    /* ----------- end ----------- */
	
	printf("\nNot found!\n");
}
}