EXCEL排序

题目

代码

 1 #include<iostream>
 2 #include<algorithm>
 3 #include<string.h>
 4 using namespace std;
 5 typedef struct stu{
 6     char cno[10];
 7     char name[10];
 8     int score;
 9 }stu;
10 int n,c;
11 bool comp(stu a, stu b){
12     if(c == 1)
13         //return a.cno < b.cno;
14         return strcmp(a.cno, b.cno) < 0;
15     else if(c == 2) {
16         if(strcmp(a.name, b.name) != 0) return strcmp(a.name, b.name) < 0;
17         else return strcmp(a.cno, b.cno) < 0;
18     }
19     else{
20         if(a.score != b.score) return a.score < b.score;
21         else return strcmp(a.cno, b.cno) < 0;
22     } 
23 }
24 int main(){
25     stu s[100010];
26     while(scanf("%d%d",&n,&c) != EOF){
27         for(int i = 0;i < n;i++){
28            scanf("%s%s%d",&s[i].cno,&s[i].name,&s[i].score); 
29         }
30         sort(s,s+n,comp);
31         printf("Case:
");
32         for(int i = 0;i < n;i++){
33             printf("%s %s %d
",s[i].cno,s[i].name,s[i].score);
34         }
35         puts("");
36     }
37     return 0;
38 }

1. 字符串比较不能直接小于等于大于号？用strcmp

strcmp 与小于等于大于的区别