source code :
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define M 3
void main_interface();
void find_interface();
void choice(long sno[], char sname[][20], int sage[], float cs[], int N);
void find_choice(long sno[], char sname[][20], int sage[], float cs[], int N);
void input(long sno[], char sname[][20], int sage[], float cs[], int N);
void output(long sno[], char sname[][20], int sage[], float cs[], int N);
void sno_find(long sno[], char sname[][20], int sage[], float cs[], int N);
void sname_find(long sno[], char sname[][20], int sage[], float cs[], int N);
void cs_sort(long sno[], char sname[][20], int sage[], float cs[], int N);
void total(long sno[], char sname[][20], int sage[], float cs[], int N);
int main(int argc, const char *argv[])
{
long sno[M];
char sname[M][20];
int sage[M];
float cs[M];
int i, j;
main_interface();
choice(sno, sname, sage, cs, M);
return 0;
}
void main_interface()
{
printf("\t\t*********************************************************************************\n");
printf("\t\t*\t\tWelcome to use the system of managing student\t\t\t*\n");
printf("\t\t*1.input students's basic information 2.output students's information\t\t*\n");
printf("\t\t*3.find students's basic information 4.sort\t\t\t\t\t*\n");
printf("\t\t*5.statistics 0.quit\t\t\t\t\t*\n");
printf("\t\t*********************************************************************************\n");
printf("\t\t Please input (0~5):");
printf("\n");
}
void find_interface()
{
printf("\t\t*********************************************************\n");
printf("\t\t*\t\tWelcome to use search operation\t\t*\n");
printf("\t\t*1.According to the student id to find\t\t\t*\n");
printf("\t\t*2.According to the student name to find\t\t*\n");
printf("\t\t*0.Return to the previous menu\t\t\t\t*\n");
printf("\t\t*********************************************************\n");
printf("Please input (0~2)");
printf("\n");
}
void choice(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int m;
while (1)
{
scanf("%d", &m);
switch (m)
{
case 1:
input(sno, sname, sage, cs, N);
main_interface();
break;
case 2:
output(sno, sname, sage, cs, N);
main_interface();
break;
case 3:
find_interface();
find_choice(sno, sname, sage, cs, N);
main_interface();
break;
case 4:
cs_sort(sno, sname, sage, cs, N);
break;
case 5:
total(sno, sname, sage, cs, N);
main_interface();
break;
case 0:
exit(1);
default:
break;
}
}
}
void find_choice(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int m;
while (1)
{
scanf("%d", &m);
switch (m)
{
case 1:
sno_find(sno, sname, sage, cs, N);
find_interface();
break;
case 2:
sname_find(sno, sname, sage, cs, N);
find_interface();
break;
case 0:
break;
}
if (0 == m)
break;
}
main_interface();
}
void input(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i;
printf("input %d student's information\n", N);
for (i = 0; i < N; i++)
{
printf("input %dth student's\n",i + 1);
printf("student id:");
scanf("%ld", &sno[i]);
getchar();
printf("name:");
gets(sname[i]);
printf("age:");
scanf("%d", &sage[i]);
printf("score:");
scanf("%f", &cs[i]);
}
}
void output(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i;
printf("output %d student's information\n", N);
for (i = 0; i < N; i++)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
void sno_find(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i;
long sno1;
printf("Please input you want to find student id:");
scanf("%ld", &sno1);
for (i = 0; i < N; i++)
{
if (sno[i] == sno1)
break;
}
if (i < N)
{
printf("output %d student's information\n", sno1);
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
else
printf("The student id you entered does not exist!\n");
}
void sname_find(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i;
char sname1[20];
printf("Please input you want to find name:");
getchar();
gets(sname1);
for (i = 0; i < N; i++)
{
if (strcmp(sname[i], sname1) == 0)
break;
}
if (i < N)
{
printf("output %d student's information\n", sname1);
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
else
printf("The student name you entered does not exist!\n");
}
void cs_sort(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i, j, k;
long tsno;
char tsname[20];
int tsage;
float tcs;
for (i = 0; i < N - 1; i++)
{
k = i;
for (j = i + 1; j < N; j++)
{
if (cs[j] > cs[k])
k = j;
}
if (k != i)
{
tsno = sno[i];
sno[i] = sno[k];
sno[k] = tsno;
strcpy(tsname, sname[i]);
strcpy(sname[i], sname[k]);
strcpy(sname[k], tsname);
tsage = sage[i];
sage[i] = sage[k];
sage[k] = tsage;
tcs = cs[i];
cs[i] = cs[k];
cs[k] = tcs;
}
}
}
void total(long sno[], char sname[][20], int sage[], float cs[], int N)
{
int i;
printf("\n excellent(score >= 90) student:\n");
for (i = 0; i < N; i++)
{
if (cs[i] >= 90)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
printf("\n well(score >= 80 && score < 90) student:\n");
for (i = 0; i < N; i++)
{
if (cs[i] >= 80 && cs[i] < 90)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
printf("\n medium(score >= 70 && score < 80) student:\n");
for (i = 0; i < N; i++)
{
if (cs[i] >= 70 && cs[i] < 80)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
printf("\n pass(score >= 60 && score < 70) student:\n");
for (i = 0; i < N; i++)
{
if (cs[i] >= 60 && cs[i] < 70)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
printf("\n fail(score < 60) student:\n");
for (i = 0; i < N; i++)
{
if (cs[i] < 60)
{
printf("%-10ld", sno[i]);
printf("%-16s", sname[i]);
printf("%-4d", sage[i]);
printf("%-6.0f", cs[i]);
printf("\n");
}
}
}
运行结果：[haoyue@centos practices]$ ./a.out
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
1
input 3 student's information
input 1th student's
student id:01
name:aa
age:12
score:78
input 2th student's
student id:02
name:bb
age:12
score:98
input 3th student's
student id:03
name:cc
age:12
score:89
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
2
output 3 student's information
1 aa 12 78
2 bb 12 98
3 cc 12 89
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
3
*********************************************************
* Welcome to use search operation *
*1.According to the student id to find *
*2.According to the student name to find *
*0.Return to the previous menu *
*********************************************************
Please input (0~2)
1
Please input you want to find student id:01
output 1 student's information
1 aa 12 78
*********************************************************
* Welcome to use search operation *
*1.According to the student id to find *
*2.According to the student name to find *
*0.Return to the previous menu *
*********************************************************
Please input (0~2)
2
Please input you want to find name:bb
output -1077645624 student's information
2 bb 12 98
*********************************************************
* Welcome to use search operation *
*1.According to the student id to find *
*2.According to the student name to find *
*0.Return to the previous menu *
*********************************************************
Please input (0~2)
0
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
4
2
output 3 student's information
2 bb 12 98
3 cc 12 89
1 aa 12 78
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
5
excellent(score >= 90) student:
2 bb 12 98
well(score >= 80 && score < 90) student:
3 cc 12 89
medium(score >= 70 && score < 80) student:
1 aa 12 78
pass(score >= 60 && score < 70) student:
fail(score < 60) student:
*********************************************************************************
* Welcome to use the system of managing student *
*1.input students's basic information 2.output students's information *
*3.find students's basic information 4.sort *
*5.statistics 0.quit *
*********************************************************************************
Please input (0~5):
0
