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E2.step7.c

@@ -0,0 +1,154 @@
+#include <stdio.h>
+#include <string.h>> 
+int j=0,q=-1;
+char e;
+struct stu
+			{
+			int id;
+			int sclass;
+			char name[10];
+			float gs;
+			float dw;
+			float yy;	
+			}st[100];
+void input()
+{
+	printf("id ");
+    printf("class ");
+    printf("name ");
+    printf("score1 ");
+  	printf("score2 ");
+    printf("score3\n");
+	scanf("%d %d %s %f %f %f",&st[j].id,&st[j].sclass,&st[j].name,&st[j].gs,&st[j].dw,&st[j].yy);
+    printf("continue?\n");
+    scanf("%*[^\n]");
+    scanf("%*c");
+	scanf("%c",&e);
+	j++;
+	if(e=='n'||e=='N')
+	{
+		return;
+	}
+	else if(e=='y'||e=='Y') 
+	{
+		input();
+	}
+}
+void cdelete()
+{
+	int i,f,m=5,n;
+  char mm,s[10];
+  	  printf("Are you sure\n");
+  	   scanf("%*[^\n]");
+    scanf("%*c");
+	  scanf("%c\n",&mm);
+	  if(mm=='n'||mm=='N')
+	  {
+	      output();
+	  }
+	  if(mm=='y'||mm=='Y')
+	  {
+         gets(s);
+  	for(f=0;f<j;f++)
+	  {
+	  if(strcmp(s,st[f].name)==0||strcmp(s,st[f].id)==0)
+	     {
+	       m=f;
+		   for(m;m<=j;m++)
+		   {
+		   	   st[m]=st[m+1];
+		   }
+		   j--;  		
+	     }
+	  }
+	  output();
+	 }
+}
+void select()
+{
+	int d,l;
+	printf("ÊäÈëѧºÅ»ò°à¼¶");
+	scanf("%d",&d);
+	for(l=0;l<j;l++)
+	{
+		if(d==st[l].id||d==st[l].sclass)
+		{
+			printf("%d %d %s %.1f %.1f %.1f\n",st[l].id,st[l].sclass,st[l].name,st[l].gs,st[l].dw,st[l].yy);
+		}
+	}
+}
+void inorder()
+{
+	int i;
+	q++;
+	for(i=q+1;i<j;i++)
+	{
+		if(st[q].sclass>st[i].sclass)
+	       {
+	       	   struct stu temp;
+	       	   temp=st[i];
+	       	   st[i]=st[q];
+	       	   st[q]=temp;
+		   }
+	}
+	if(q==j-1)
+	{
+		q=-1;
+		return;
+	}
+	inorder();
+}
+void corder()
+{
+	float a,b;
+	int i;
+	q++;
+	for(i=q+1;i<j;i++)
+	{
+		a=st[i].dw+st[i].gs+st[i].yy;
+		b=st[q].dw+st[q].gs+st[q].yy;
+		if(a>b&&st[i].sclass==st[q].sclass)
+		{
+			struct stu temp;
+	       	   temp=st[i];
+	       	   st[i]=st[q];
+	       	   st[q]=temp;
+		}
+	}
+	if(q==j)
+	{
+		q=-1;
+	return;
+    }   
+	else corder();
+}
+void order()
+{
+	inorder();
+	corder();
+}
+void output()
+{
+	int l=0;
+	for(l=0;l<j;l++)
+	{
+		printf("%d %d %s %.1f %.1f %.1f\n",st[l].id,st[l].sclass,st[l].name,st[l].gs,st[l].dw,st[l].yy);
+	}
+}
+int main( ) 
+{ 
+    int a;
+	mn:
+	printf("1.Input\n2.Delete\n3.Select\n4.Order\n5.Output\n6.Quit\nplease input your option\n");
+	scanf("%d",&a);
+    switch(a)
+    {
+    	case 1:input();break;
+		case 2:cdelete();break;
+		case 3:select();break;
+		case 4:order();break;
+		case 5:output();break;
+		case 6:return 0;
+	}
+	goto mn;
+}