实验9-5 查找书籍 (20分)
给定n本书的名称和定价,本题要求编写程序,查找并输出其中定价最高和最低的书的名称和定价。
输入格式:
输入第一行给出正整数n(<10),随后给出n本书的信息。每本书在一行中给出书名,即长度不超过30的字符串,随后一行中给出正实数价格。题目保证没有同样价格的书。
输出格式:
在一行中按照“价格, 书名”的格式先后输出价格最高和最低的书。价格保留2位小数。
输入样例:
3
Programming in C
21.5
Programming in VB
18.5
Programming in Delphi
25.0
输出样例:
25.00, Programming in Delphi
18.50, Programming in VB
#include<stdio.h>
int main(){
int n,i,j;
scanf("%d",&n);
struct cj{
char book[30];
double price;
}all[n];
for(i=0;i<n;i++){
scanf("\n"); //需要读入这个,否则后面的都不能读全;
gets(all[i].book);
scanf("%lf",&all[i].price); //读入书名和价格
printf("all[i].book=%s,all[i].price=%.2lf\n",all[i].book,all[i].price);
}
double max=0;
double min=100;
for(j=0;j<n;j++){
max=all[j].price>max?all[j].price:max;
min=all[j].price<min?all[j].price:min;
}
printf("max=%.2lf,min=%.2lf\n",max,min);
for(int k=0;k<n;k++){
if(max==all[k].price)
printf("%.2lf %s\n",max,all[k].book);
if(min==all[k].price){
printf("%.2lf %s\n",min,all[k].book);
}
}
return 0;
}
3
Programming in C
21.5
Programming in VB
18.5
Programming in Delphi
25.0
warning: this program uses gets(), which is unsafe.
all[i].book=Programming in C,all[i].price=21.50
all[i].book=Programming in VB,all[i].price=18.50
all[i].book=Programming in Delphi,all[i].price=25.00
max=25.00,min=18.50
18.50 Programming in VB
25.00 Programming in Delphi
Program ended with exit code: 0