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7.c

@@ -0,0 +1,115 @@
+#include<stdio.h>
+#include<string.h> 
+#define N 7
+
+struct stu_info
+{
+	int num,cls;
+	char name[20];
+	float math,physics,english;
+};
+
+struct stu_info stu[N]={{10001,11,"Zhang",99.5,88.5,89.5},
+						{10002,12,"Yang",77.9,56.5,87.5},
+						{10003,11,"Liang",92.5,99.0,60.5},
+						{10004,11,"Cai",89.6,56.9,90.5},
+						{10005,14,"Fu",55.6,67.9,98.9},
+						{10006,12,"Mao",22.1,45.9,99.2},
+						{10007,13,"Zhan",35.6,67.9,88.0}};
+
+void sort(struct stu_info *stu,int n)
+{
+	int i,j;
+	struct stu_info tmp;
+	for(i=0;i<n;i++)
+	{
+		for(j=0;j<n-i-1;j++)
+		{
+			if(((stu+j)->cls>(stu+j+1)->cls)||((stu+j)->cls==(stu+j+1)->cls)&&((stu+j)->num>(stu+j+1)->num))
+			{
+				tmp = *(stu+j);
+				*(stu+j) = *(stu+j+1);
+				*(stu+j+1) = tmp;
+			} 
+		}
+	}
+	return;
+}
+
+void s_cls()
+{
+	int to,from,i;
+	scanf("%d-%d",&to,&from);
+	for(i=0;i<N;i++) if(to<=stu[i].cls&&stu[i].cls<=from) printf("%d %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english);
+}
+
+void s_num()
+{
+	int to,from,i;
+	scanf("%d-%d",&to,&from);
+	for(i=0;i<N;i++) if(to<=stu[i].num&&stu[i].num<=from) printf("%d %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english);
+}
+
+void s_name()
+{
+	int i,j;
+	char key[20];
+	scanf("%s",key);
+	for(i=0;i<N;i++)
+	{
+		j=0;
+		while(key[j]!='*'&&stu[i].name[j]==key[j]) j++;
+		if(key[j]=='*') printf("%d %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english);
+	}
+}
+
+void s_total()
+{
+	int i;
+	float lim,total;
+	scanf("%d",&lim);
+	for(i=0;i<N;i++)
+	{
+		total=stu[i].math+stu[i].physics+stu[i].english;
+		if(total>=lim) printf("%d %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english);
+	}
+}
+
+void s_cls_num()
+{
+	int key,to,from,i;
+	scanf("%d.%d-%d",&key,&to,&from);
+	for(i=0;i<N;i++)
+	{
+		if(stu[i].cls==key&&to<=stu[i].num&&stu[i].num<=from)
+		{
+			printf("%d %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].math,stu[i].physics,stu[i].english);
+		}
+	}
+}
+
+int main()
+{
+	int op;
+	scanf("%d",&op);
+	sort(stu,N);
+	switch(op)
+	{
+		case(1):
+			s_cls();
+			break;
+		case(2):
+			s_num();
+			break;
+		case(3):
+			s_name();
+			break;
+		case(4):
+			s_total();
+			break;
+		case(5):
+			s_cls_num();
+			break;
+	}
+	return 0;
+}