（水）
tips
1
cmp比较函数，若是字符串比较，一定要写成return strcmp(char *, char *) >(/</==) 0;。 头文件包含string.h。
题目大意
模仿excel表排序功能。
AC代码
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<iostream>
#include<string.h>
#include<vector>
#include<algorithm>
using namespace std;
struct student {
char id[8];
char name[10];
int score;
};
bool cmp1(student a, student b) {
return strcmp(a.id, b.id) < 0;
}
bool cmp2(student a, student b) {
if (strcmp(a.name, b.name) == 0) {
return strcmp(a.id, b.id) < 0;
}
else return strcmp(a.name, b.name) < 0;
}
bool cmp3(student a, student b) {
if (a.score == b.score)
return strcmp(a.id, b.id) < 0;
else return a.score < b.score;
}
int main() {
vector<student>stu;
int i;
int n, col;
scanf("%d%d", &n, &col);
for (i = 0;i < n;i++) {
student stutemp;
scanf("%s", stutemp.id);
scanf("%s", stutemp.name);
scanf("%d", &stutemp.score);
stu.push_back(stutemp);
}
if (col == 1) {
sort(stu.begin(), stu.end(), cmp1);
}
if (col == 2) {
sort(stu.begin(), stu.end(), cmp2);
}
if (col == 3) {
sort(stu.begin(), stu.end(), cmp3);
}
for (i = 0;i < n;i++) {
printf("%s %s %d\n", stu[i].id, stu[i].name, stu[i].score);
}
return 0;
}
