实验七

实验一

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

#include <stdlib.h>

#define N 5

 

typedef struct student {

long no;

char name[20];

int score;

 

}STU;

void input(STU s[], int n);

int findMinlist(STU s[], STU t[], int n);

void output(STU s[], int n);

 

int main() {

STU stu[N], minlist[N];

int count;

 

printf("录入%d个学生的信息\n", N);

input(stu, N);

printf("\n统计最低分数人数和学生信息……\n");

count = findMinlist(stu, minlist, N);

 

printf("\n一共有%d个最低分，信息如下：\n", count);

output(minlist, count);

return 0;

 

}

 

void input(STU s[], int n) {

int i;

for ( i = 0; i < n; i++)

{

scanf("%ld %s %d", &s[i].no, &s[i].name, &s[i].score);

}

}

int findMinlist(STU s[], STU t[], int n) {

int i=0, j=0;

for ( i = 0; i <n ; i++)

{

if (s[i].score<s[j].score)

{

j = i;

}

}

int k = 0;

for ( i = 0; i < n; i++)

{

if (s[i].score==s[j].score)

{

t[k] = s[i];

k++;

}

}

return k;

 

}

void output(STU s[], int n) {

int i;

for ( i = 0; i < n; i++)

{

printf("%ld %s %d\n", s[i].no, s[i].name, s[i].score);

}

}

实验二

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include<string>
#define N 10

typedef struct student {
long int id;
char name[20];
float objective;
float subjective;
float sum;
char level[10];

}STU;

void input(STU s[], int n);
void output(STU s[], int n);
void process(STU s[], int n);

int main() {
STU stu[N];

printf("录入%d个考生的信息：准考证号，姓名，客观题的得分（<=40)，操作题得分（<=60\n", N);
input(stu, N);

printf("\n对考生信息进行处理：计算总分，确定等级\n");
process(stu, N);

printf("\n打印考生完整信息：准考证号，姓名，客观题得分，操作题得分，总分，等级\n");
output(stu, N);

return 0;
}

 

void input(STU s[], int n) {
int i;
for (i = 0; i < n; i++)
{
scanf("%ld %s %f %f", &s[i].id, &s[i].name, &s[i].objective, &s[i].subjective);
}

}

 

void process(STU s[], int n) {
int i;
for ( i = 0; i < n; i++)
{
s[i].sum = s[i].objective + s[i].subjective ;
}
int j = 0;
STU t;
for ( i = 0; i < n-1; i++)
{
for ( j = 0; j < n-1-i; j++)
{
if (s[j].sum<s[j+1].sum)
{
t = s[j];
s[j] = s[j + 1];
s[j + 1] = t;

}
}
}
for ( i = 0; i < n; i++)
{
if ((i + 1) <=0.1*n )
{
strcpy(s[i].level, "优秀");
}
else if ((i+1)>0.1*n&&(i+1)<=0.5*n)
{
strcpy(s[i].level, "合格");
}
else
{
strcpy(s[i].level, "不合格");
}
}
}

void output(STU s[], int n) {
int i;
for ( i = 0; i < n; i++)
{
printf("%ld %s %f %f %f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
}
}

 实验三

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include<string>
#define N 10

typedef struct student {
long int id;
char name[20];
float objective;
float subjective;
float sum;
char level[10];

}STU;

void input(STU s[], int n,FILE*);
void output(STU s[], int n,FILE*);
void process(STU s[], int n);

int main() {
STU stu[N];
FILE* fp1, * fp2;
fp1 = fopen("examinee.txt", "r");
fp2 = fopen("result.txt", "w+");

printf("录入%d个考生的信息：准考证号，姓名，客观题的得分（<=40)，操作题得分（<=60\n", N);
input(stu, N,fp1);

printf("\n对考生信息进行处理：计算总分，确定等级\n");
process(stu, N);

printf("\n打印考生完整信息：准考证号，姓名，客观题得分，操作题得分，总分，等级\n");
output(stu, N,fp2);

return 0;
}

 

void input(STU s[], int n,FILE*fp1) {
int i;
for (i = 0; i < n; i++)
{
fscanf(fp1,"%ld %s %f %f", &s[i].id, &s[i].name, &s[i].objective, &s[i].subjective);
}

}

 

void process(STU s[], int n) {
int i;
for ( i = 0; i < n; i++)
{
s[i].sum = s[i].objective + s[i].subjective ;
}
int j = 0;
STU t;
for ( i = 0; i < n-1; i++)
{
for ( j = 0; j < n-1-i; j++)
{
if (s[j].sum<s[j+1].sum)
{
t = s[j];
s[j] = s[j + 1];
s[j + 1] = t;

}
}
}
for ( i = 0; i < n; i++)
{
if ((i + 1) <=0.1*n )
{
strcpy(s[i].level, "优秀");
}
else if ((i+1)>0.1*n&&(i+1)<=0.5*n)
{
strcpy(s[i].level, "合格");
}
else
{
strcpy(s[i].level, "不合格");
}
}
}

void output(STU s[], int n,FILE*fp2) {
int i;
for ( i = 0; i < n; i++)
{
fprintf(fp2,"%ld %s %f %f %f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);

printf("%ld %s %f %f %f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
}
}

 

实验四

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include<string>
#include<time.h>

int main() {
char stu[100][100] = { '\0' };
int i;
FILE* fp1, * fp2;
fp1 = fopen("list.txt", "r");
fp2 = fopen("lucky.txt", "w+");
int random;
int line = 1;

srand(time(NULL));

for (i = 0; i < 5; i++)
{

random = rand() % 80 + 1;

while (line - 1 < random)
{
if (fgetc(fp1) == '\n')
{
line++;
}

}
fgets(stu[i],50 , fp1);
rewind(fp1);
line = 1;

}

for (i = 0; i < 5; i++)
{
printf("%s", stu[i]);
fprintf(fp2, "%s", stu[i]);
}
printf("\n");
fprintf(fp2, "\n");

return 0;

}