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7.cpp

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+#include<stdio.h>
+#include<string.h>
+struct Info
+{
+	char num[6], name[7];
+	int cls;
+	float math, phy, eng, sum, ave;
+}arr[7]={{10001,11,"Zhang",99.5,88.5,89.5,0,0},
+		 {10002,12,"Yang",77.9,56.5,87.5,0,0},
+	   	 {10003,11,"Ling",92.5,99.0,60.5,0,0},
+		 {10004,11,"Cai",89.6,56.9,90.5,0,0}, 
+		 {10005,14,"Fu",55.6,67.9,98.9,0,0},
+		 {10006,12,"Mao",22.1,45.9,99.2,0,0},
+		 {10007,13,"Zhan",35.6,67.9,88.0,0,0}};
+struct Info ins, mod;
+void Input(int i)
+{
+	scanf("%s", arr[i].num);
+	scanf("%d", &arr[i].cls);
+	scanf("%s", arr[i].name);
+	scanf("%f%f%f", &arr[i].math, &arr[i].phy, &arr[i].eng);
+	arr[i].sum = arr[i].math + arr[i].phy + arr[i].eng;
+	arr[i].ave = arr[i].sum / 3.0;
+}
+void Output(int i)
+{
+	/*if (i == 0 || arr[i].cls != arr[i - 1].cls)
+		printf("%d ", arr[i].cls)
+	else
+		printf("   ");*/
+	printf("%s ", arr[i].num);
+	printf("%d ", arr[i].cls);
+	printf("%s ", arr[i].name);
+	printf("%.1f %.1f %.1f", arr[i].math, arr[i].phy, arr[i].eng);
+	printf("\n");
+}
+void Rank(struct Info arr[],int s)
+{
+	for (int i = 0; i < s; i++)
+		for (int j = s - 1; j > i; j--)
+		{
+			if (arr[j].cls < arr[j - 1].cls)
+			{
+				struct Info temp = arr[j];
+				arr[j] = arr[j - 1];
+				arr[j - 1] = temp;
+			}
+		}
+	for (int i = 0; i < s; i++)
+		for (int j = s - 1; j > 0; j--)
+		{
+			if (arr[j].cls == arr[j - 1].cls && arr[j].sum > arr[j - 1].sum)
+			{
+				struct Info temp = arr[j];
+				arr[j] = arr[j - 1];
+				arr[j - 1] = temp;
+			}
+		}
+}
+void Scls(int s)
+{
+	int cl, ch;
+	scanf("%d-%d", &cl, &ch);
+	for (int i = 0; i < s; i++)
+		if (arr[i].cls >= cl && arr[i].cls <= ch)
+			Output(i);
+}
+void Snum(int s)
+{
+	char str[12];
+	gets(str);
+	char nl[6], nh[6];
+	strncpy(nl, str, 5);
+	for (int i = 6; i < 11; i++)
+		nh[i - 6] = str[i];
+	for (int i = 0; i < s; i++)
+		if (strcmp(arr[i].num, nl) >= 0 && strcmp(arr[i].num, nh) <= 0)
+			Output(i);
+}
+void Sname(int s)
+{
+	char n[6];
+	gets(n);
+	for (int i = 0; i < s; i++)
+	{
+		int f = 0;
+		for (int j = 0; n[j] != '*'; j++)
+			if (n[j] != arr[i].name[j])
+			{
+				f = 1;
+				break;
+			}
+		if (f == 0)
+			Output(i);
+	}
+}
+void Ssum(int s)
+{
+	float scr;
+	scanf("%f", &scr);
+	for (int i = 0; i < s; i++)
+		if (arr[i].sum >= scr)
+			Output(i);
+}
+void Scn(int s)
+{
+	int clas;
+	scanf("%d.", &clas);
+	char str[12];
+	gets(str);
+	char nl[6], nh[6];
+	strncpy(nl, str, 5);
+	for (int i = 6; i < 11; i++)
+		nh[i - 6] = str[i];
+	for (int i = 0; i < s; i++)
+		if (arr[i].cls == clas && strcmp(arr[i].num, nl) >= 0 && strcmp(arr[i].num, nh) <= 0)
+			Output(i);
+}
+void Seek(int s)
+{
+	int c;
+	scanf("%d ", &c);
+	switch (c)
+	{
+	case 1:Scls(s); break;
+	case 2:Snum(s); break;
+	case 3:Sname(s); break;
+	case 4:Ssum(s); break;
+	case 5:Scn(s); break;
+	};
+}
+int main()
+{
+	int s = 0, * p = &s;
+	for (; s < 7; s++)
+		Input(s);
+	Rank(arr, s);
+	Seek(s);
+	
+}