first commit

wrbnb.cpp

@@ -0,0 +1,137 @@
+
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+struct singer
+{
+	char  id[10];
+	int   rank;
+	char name[10];
+	int score[10];
+	float mark;
+};
+int main(void)
+{
+	int i,b,j,s,n,t;
+	FILE *fp;
+	int sum,max,min;
+    struct singer a[5];
+    
+	printf("          歌手比赛系统         \n");
+	printf("          菜单                 \n");
+	printf("1:输入选手编号和姓名\n");
+	printf("2:评委打分\n");
+	printf("3:计算平均分\n");
+	printf("4:成绩排序\n");	
+	printf("5:写入数据文件\n");
+    printf("6:查看文件数据\n");
+	printf("7:退出系统\n");
+	printf("    ");
+	for( ; ;)
+	{
+     printf("输入序号选择功能");
+	 scanf("%d",&n);
+	 switch(n)
+	 {
+case 1:
+	     printf("输入选手编号和姓名\n");
+		for(i=0;i<5;i++)
+		{ 
+		printf("输入%d号选手的编号和名字:",i);
+	     scanf("%s %s",a[i].id,a[i].name);
+		} 
+		 break;
+		 
+case 2:
+	        printf("评委打分\n");
+			printf("最高分为100分\n");
+		 	for(i=0;i<5;i++)
+			 {
+		 		printf("评委给%d号歌手打分:\n",i);
+		 	for(j=0;j<5;j++)
+			 {
+		 	printf("%d号评委给歌手打分:",j);
+ 	        scanf("%d",&a[i].score[j]);
+			 }
+		}
+		    break;
+		    
+case 3:
+		for(i=0;i<5;i++)
+	{
+	  max=a[i].score[0];
+	  min=a[i].score[0];
+	  sum=0;
+	 for(j=0;j<5;j++)
+	 {   
+	 
+	 	sum=sum+a[i].score[j];
+	 	
+	 	if(a[i].score[j]>max)
+		 {
+	 	max=a[i].score[j];
+		 }
+	 	if(a[i].score[j]<min)
+		 {
+	 	min=a[i].score[j];
+		 }
+	 }
+
+	 printf("%d号歌手的平均分",i);
+	 a[i].mark=(sum-min-max)/3.0;
+	 printf("%f\n",a[i].mark);
+	 }
+     break;
+case 4:
+        for(i=0;i<=n;i++)
+		{
+			    s=0;
+				for(j=0;j<=n;j++)
+			{
+				if(a[i].mark<a[j].mark)
+				s++;
+			}
+				a[i].rank=s;
+		}
+				for(i=0;i<=n;i++)
+				{
+					for(j=0;j<=n;j++)
+					{
+						if(i==a[j].rank)
+							printf("%s是第%d   得分为%.2f\n",a[j].name,i,a[j].mark);
+					}
+					printf("\n");
+		        }
+				break;
+case 5:
+	 if((fp=fopen("singer.txt","w"))==NULL)
+	 {
+	 	printf("cann't open file");
+	 	
+	 }
+	 
+	 for(i=0;i<5;i++)
+	 {
+	 	fwrite(&a[i],sizeof(struct singer),1,fp);
+	 }
+	 fclose(fp);
+	 printf("保存成功\n"); 
+    break;
+case 6:
+	if((fp=fopen("singer.txt","rb"))==NULL)
+	{
+		printf("cann't open file");
+	}
+	for(i=0;i<5;i++)
+	{
+		fscanf(fp,"%s %s %f",a[i].id,a[i].name,&a[i].mark);
+	printf("%s %s %f\n",a[i].id,a[i].name,&a[i].mark);
+	}
+	break;
+case 7:
+	exit(0);
+}
+
+}
+return 0;
+}