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q8.c

@@ -0,0 +1,100 @@
+#include<stdio.h>
+#include<string.h>
+#include<math.h>
+#include<stdlib.h>
+struct stud
+{
+char id[20];
+char clas[20];
+char name[20];
+double score1;
+double score2;
+double score3;
+double score;
+};int SSS;int rak[20];
+int main()
+{struct stud stu[10];
+void men();void inpu(struct stud stu[10],int n[1]);void del(struct stud stu[10],int n[1]);void sel(struct stud stu[10],int n[1]);
+void ord(struct stud stu[10],int n[1]);void out(struct stud stu[10],int n[1]);
+int n[1];int i;
+for(i=0;i<20;i++){rak[i]=i;}
+start:
+men();scanf("%d",&i);
+switch(i)
+{case 1:inpu(stu,n);goto start;
+ case 2:del(stu,n);goto start;
+ case 3:sel(stu,n);goto start;
+ case 4:ord(stu,n);goto start;
+ case 5:out(stu,n);goto start;
+ case 6:break;	
+}
+return 0;
+}
+
+void men()
+{printf("\n1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\nplease input your option\n");}
+
+void inpu(struct stud stu[10],int n[1])
+{int i=0,p=1;char a[20];
+while(p)
+{printf("Id ");scanf("%s",&stu[i].id);
+printf("class ");scanf("%s",&stu[i].clas);
+printf("name ");scanf("%s",&stu[i].name);
+printf("score1 ");scanf("%lf",&stu[i].score1);
+printf("score2 ");scanf("%lf",&stu[i].score2);
+printf("score3 ");scanf("%lf",&stu[i].score3);
+printf("continue?\n");
+while(1){scanf("%s",&a);
+if(strcmp(a,"no")==0){p=0;n[0]=SSS=i;break;}else if(strcmp(a,"yes")==0){break;}else{printf("please input yes/no\n");}}
+i++;
+}}
+
+void del(struct stud stu[10],int n[1])
+{char a[20];int i,p=1;
+while(p)
+{scanf("%s",&a);
+for(i=0;i<=n[0];i++)
+{if(strcmp(a,stu[i].id)==0||strcmp(a,stu[i].name)==0){break;}}
+if(i<=n[0]&&SSS)
+{strcpy(stu[i].id,"");strcpy(stu[i].clas,"");strcpy(stu[i].name,"");stu[i].score1=0;stu[i].score2=0;stu[i].score3=0;SSS--;}
+for(i=0;i<=n[0];i++)
+{if(stu[i].score1!=0)
+{printf("%s %s %s %3.1f %3.1f %3.1f\n",stu[i].id,stu[i].clas,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);}}
+printf("continue?\n");
+while(1){scanf("%s",&a);
+if(strcmp(a,"no")==0){p=0;break;}else if(strcmp(a,"yes")==0){break;}else{printf("please input yes/no\n");}}
+}for(i=0;i<20;i++){rak[i]=i;}}
+
+void sel(struct stud stu[10],int n[1])
+{int i,p=1,t;char a[20];
+while(p)
+{scanf("%s",&a);
+t=1;
+for(i=0;i<=n[0];i++)
+{if(strcmp(a,stu[i].id)==0||strcmp(a,stu[i].clas)==0)
+{t=0;printf("%s %s %s %3.1f %3.1f %3.1f\n",stu[i].id,stu[i].clas,stu[i].name,stu[i].score1,stu[i].score2,stu[i].score3);}}
+if(t){printf("there is no eligible student\n");}printf("continue?\n");
+while(1){scanf("%s",&a);
+if(strcmp(a,"no")==0){p=0;break;}else if(strcmp(a,"yes")==0){break;}else{printf("please input yes/no\n");}}
+}}
+
+void ord(struct stud stu[10],int n[1])
+{int i,j,k,a,b;int mark[20];
+for(i=0;i<=n[0];i++){mark[i]=0;stu[i].score=stu[i].score1+stu[i].score2+stu[i].score3;}
+for(i=0;i<=SSS;i++)	
+{for(k=0,j=0;j<=n[0]&&k<=n[0];)
+{if(mark[j]||stu[j].score1==0){j++;continue;}if(mark[k]||stu[k].score1==0){k++;continue;}
+a=atoi(stu[j].clas);b=atoi(stu[k].clas);
+if(a<b){k=j;}if(a==b&&stu[j].score>stu[k].score){k=j;}j++;continue;	
+}rak[i]=k;mark[k]=1;	
+}
+for(i=0;i<=SSS;i++)
+{j=rak[i];
+printf("%s %s %s %3.1f %3.1f %3.1f\n",stu[j].id,stu[j].clas,stu[j].name,stu[j].score1,stu[j].score2,stu[j].score3);	
+}}
+
+void out(struct stud stu[10],int n[1])
+{int i,j,k;
+for(i=k=0;i<=n[0]&&k<=SSS;i++)
+{j=rak[i];if(stu[j].score1!=0){
+printf("%s %s %s %3.1f %3.1f %3.1f\n",stu[j].id,stu[j].clas,stu[j].name,stu[j].score1,stu[j].score2,stu[j].score3);k++;}}}