Sort student records first by age, then by major, and lastly by last_name.
1015 Lee Susan 16 F 600 8721 HKG
1029 Han Jun 17 M 100 2311 PEK
1022 Woods Michael 17 M 540 8722 PHL
1010 Lee Derek 17 M 600 2192 HOU
1016 Schwartz Mark 17 M 600 2192 DET
1034 Epp Eric 18 M 50 5718 BOS
1027 Brody Paul 18 M 520 8723 LOS
1025 Goldman Mark 18 M 520 7134 PIT
1024 Prater Stacy 18 F 540 7271 BAL
1033 Simms William 18 M 550 8772 NAR
1007 Apap Lisa 18 F 600 8918 PIT
1014 Norris Charles 18 M 600 8741 DAL
1019 Pang Arthur 18 M 600 2192 WAS
1006 Schultz Andy 18 M 600 1148 BAL
1001 Smith Linda 18 F 600 1121 BAL
1021 Andreou George 19 M 520 8722 NYC
1026 Pang Eric 19 M 520 7134 HKG
1002 Kim Tracy 19 F 600 7712 HKG
1009 Tai Eric 19 M 600 2192 YYZ
1023 Shieber David 20 M 520 8722 NYC
1032 Brown Eric 20 M 550 8772 ATL
1028 Rugh Eric 20 M 550 2311 ROC
1031 Smith Sarah 20 F 550 8772 PHL
1012 Davis Steven 20 M 600 7723 PIT
1004 Kumar Dinesh 20 M 600 8423 CHI
1018 Leighton Michael 20 M 600 1121 PIT
1008 Nelson Jandy 20 F 600 9172 BAL
1030 Cheng Lisa 21 F 550 2311 SFO
1003 Jones Shiela 21 F 600 7792 WAS
1020 Thornton Ian 22 M 520 7271 NYC
1011 Adams David 22 M 600 1148 PHL
1035 Schmidt Sarah 26 F 50 5718 WAS
1005 Gompers Paul 26 M 600 1121 YYZ
1017 Wilson Bruce 27 M 600 1148 LON
struct.1
struct.2
struct.3
Sort student records first by age, then by major, and lastly by last_name.
1015 Lee Susan 16 F 600 8721 HKG
1029 Han Jun 17 M 100 2311 PEK
1022 Woods Michael 17 M 540 8722 PHL
1010 Lee Derek 17 M 600 2192 HOU
1016 Schwartz Mark 17 M 600 2192 DET
1034 Epp Eric 18 M 50 5718 BOS
1027 Brody Paul 18 M 520 8723 LOS
1025 Goldman Mark 18 M 520 7134 PIT
1024 Prater Stacy 18 F 540 7271 BAL
1033 Simms William 18 M 550 8772 NAR
1007 Apap Lisa 18 F 600 8918 PIT
1014 Norris Charles 18 M 600 8741 DAL
1019 Pang Arthur 18 M 600 2192 WAS
1006 Schultz Andy 18 M 600 1148 BAL
1001 Smith Linda 18 F 600 1121 BAL
1021 Andreou George 19 M 520 8722 NYC
1026 Pang Eric 19 M 520 7134 HKG
1002 Kim Tracy 19 F 600 7712 HKG
1009 Tai Eric 19 M 600 2192 YYZ
1023 Shieber David 20 M 520 8722 NYC
1032 Brown Eric 20 M 550 8772 ATL
1028 Rugh Eric 20 M 550 2311 ROC
1031 Smith Sarah 20 F 550 8772 PHL
1012 Davis Steven 20 M 600 7723 PIT
1004 Kumar Dinesh 20 M 600 8423 CHI
1018 Leighton Michael 20 M 600 1121 PIT
1008 Nelson Jandy 20 F 600 9172 BAL
1030 Cheng Lisa 21 F 550 2311 SFO
1003 Jones Shiela 21 F 600 7792 WAS
1020 Thornton Ian 22 M 520 7271 NYC
1011 Adams David 22 M 600 1148 PHL
1035 Schmidt Sarah 26 F 50 5718 WAS
1005 Gompers Paul 26 M 600 1121 YYZ
1017 Wilson Bruce 27 M 600 1148 LON
主程序 (不能修改)
struct T_student {
double student_id;
char last_name[9];
char first_name[8];
double age;
char sex[2];
double major;
double advisor;
char city_code[4];
};
struct T_student student[] = {
{ 1001, "Smith", "Linda", 18, "F", 600, 1121, "BAL" },
{ 1002, "Kim", "Tracy", 19, "F", 600, 7712, "HKG" },
{ 1003, "Jones", "Shiela", 21, "F", 600, 7792, "WAS" },
{ 1004, "Kumar", "Dinesh", 20, "M", 600, 8423, "CHI" },
{ 1005, "Gompers", "Paul", 26, "M", 600, 1121, "YYZ" },
{ 1006, "Schultz", "Andy", 18, "M", 600, 1148, "BAL" },
{ 1007, "Apap", "Lisa", 18, "F", 600, 8918, "PIT" },
{ 1008, "Nelson", "Jandy", 20, "F", 600, 9172, "BAL" },
{ 1009, "Tai", "Eric", 19, "M", 600, 2192, "YYZ" },
{ 1010, "Lee", "Derek", 17, "M", 600, 2192, "HOU" },
{ 1011, "Adams", "David", 22, "M", 600, 1148, "PHL" },
{ 1012, "Davis", "Steven", 20, "M", 600, 7723, "PIT" },
{ 1014, "Norris", "Charles", 18, "M", 600, 8741, "DAL" },
{ 1015, "Lee", "Susan", 16, "F", 600, 8721, "HKG" },
{ 1016, "Schwartz", "Mark", 17, "M", 600, 2192, "DET" },
{ 1017, "Wilson", "Bruce", 27, "M", 600, 1148, "LON" },
{ 1018, "Leighton", "Michael", 20, "M", 600, 1121, "PIT" },
{ 1019, "Pang", "Arthur", 18, "M", 600, 2192, "WAS" },
{ 1020, "Thornton", "Ian", 22, "M", 520, 7271, "NYC" },
{ 1021, "Andreou", "George", 19, "M", 520, 8722, "NYC" },
{ 1022, "Woods", "Michael", 17, "M", 540, 8722, "PHL" },
{ 1023, "Shieber", "David", 20, "M", 520, 8722, "NYC" },
{ 1024, "Prater", "Stacy", 18, "F", 540, 7271, "BAL" },
{ 1025, "Goldman", "Mark", 18, "M", 520, 7134, "PIT" },
{ 1026, "Pang", "Eric", 19, "M", 520, 7134, "HKG" },
{ 1027, "Brody", "Paul", 18, "M", 520, 8723, "LOS" },
{ 1028, "Rugh", "Eric", 20, "M", 550, 2311, "ROC" },
{ 1029, "Han", "Jun", 17, "M", 100, 2311, "PEK" },
{ 1030, "Cheng", "Lisa", 21, "F", 550, 2311, "SFO" },
{ 1031, "Smith", "Sarah", 20, "F", 550, 8772, "PHL" },
{ 1032, "Brown", "Eric", 20, "M", 550, 8772, "ATL" },
{ 1033, "Simms", "William", 18, "M", 550, 8772, "NAR" },
{ 1034, "Epp", "Eric", 18, "M", 50, 5718, "BOS" },
{ 1035, "Schmidt", "Sarah", 26, "F", 50, 5718, "WAS" }
};
#define len(t) (sizeof t / sizeof(struct T_##t))
#include "source.c"
#include <stdio.h>
void print_a_record(struct T_student * s) {
printf("%d\t%s\t%s\t%d\t%s\t%d\t%d\t%s\n",
(int)s->student_id,
s->last_name,
s->first_name,
(int)s->age,
s->sex,
(int)s->major,
(int)s->advisor,
s->city_code);
}
void print_all_records() {
for (int i = 0; i < len(student); ++ i) {
print_a_record(student + i);
}
}
int main() {
sort_by_last_name(); // Just do it
print_all_records();
}我的答案
#include <stdio.h>
#include <string.h>
void sort_by_last_name(){
for(int i=0;i<33;i++)
{
for(int j=0;j<33;j++)
{
if(student[j].age>student[j+1].age){
struct T_student temp;
temp=student[j];
student[j]=student[j+1];
student[j+1]=temp;
}
if((student[j].age==student[j+1].age)&&(student[j].major>student[j+1].major)){
struct T_student temp;
temp=student[j];
student[j]=student[j+1];
student[j+1]=temp;
}
if(((student[j].age==student[j+1].age)&&(student[j].major==student[j+1].major))&&(strcmp(student[j].last_name,student[j+1].last_name)>0)){
struct T_student temp;
temp=student[j];
student[j]=student[j+1];
student[j+1]=temp;
}
}
}
}