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实验7

时间:2023-06-13 10:34:02浏览次数:36  
标签:ch int void char STU 实验 include

task4

编程代码

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

int main()
{
    FILE *fp;
    int x = 0;
    char ch;

    if((fp = fopen("d:\\data4.txt", "r")) == NULL) {
        printf("Fail to initialize\n");
        exit(0);
    }

    ch = fgetc(fp);
    while(ch != EOF) {
        if(ch != ' ' && ch != '\n')
            x++;
        ch = fgetc(fp);
    }

    printf("data4.txt中共包含字符数(不计空白符):%d\n", x);

    return 0;
}

运行截图

task5

编程代码

#define N 10
typedef struct {
long int id;
char name[20];
float objective; // 客观题得分
float subjective; // 操作题得分
float sum;
char level[10];
} STU;
// 函数声明
void input(STU s[], int n);
void output(STU s[], int n);
void process(STU s[], int n);
int main() {
STU stu[N];
printf("从文件读入%d个考生信息: 准考证号,姓名,客观题得分(<=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, 并保存到文件中");
output(stu, N);
return 0;
}
// 从文本文件examinee.txt读入考生信息:准考证号,姓名,客观题得分,操作题得分
void input(STU s[], int n) {
int i;
FILE *fin;
fin = fopen("examinee.txt", "r");
if (fin == NULL) {
printf("fail to open file\n");
exit(0);
}
while (!feof(fin)) {
for (i = 0; i < n; i++)
fscanf(fin, "%ld %s %f %f", &s[i].id, s[i].name,
&s[i].objective, &s[i].subjective);
}
fclose(fin);
}
// 输出考生完整信息: 准考证号,姓名,客观题得分,操作题得分,总分,等级
// 不仅输出到屏幕上,还写到文本文件result.txt中
void output(STU s[], int n) {
FILE *fout;
int i;
// 输出到屏幕
printf("\n");
printf("准考证号\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\n");
for (i = 0; i < n; i++)
printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id,
s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
// 保存到文件
fout = fopen("result.txt", "w");
if (!fout) {
printf("fail to open or create result.txt\n");
exit(0);
}
fprintf(fout, "准考证号\t\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\n");
for (i = 0; i < n; i++)
fprintf(fout, "%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id,
s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level);
fclose(fout);
}
// 对考生信息进行处理:计算总分,排序,确定等级
void process(STU s[], int n) {
// 补足代码
// ×××
int i,j,m=0;
    STU t;
    for(i=0;i<N;i++)
    {s[i].sum=s[i].objective+s[i].subjective;}
    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==0)
        strcpy(s[i].level ,"优秀");
    else
    if(i>0&&i<4)
        strcpy(s[i].level,"合格");
    else
        strcpy(s[i].level,"不合格");}
}

运行截图

task6

编程代码

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include<time.h>
 
#define N 80
 
typedef struct {
    long int id;
    char name[20];
    char clas[100];
    int num;
} STU;
 
// 函数声明
void input(STU s[], int n);
void output(STU s[], int n);
void process(STU s[], int n);
 
int main() {
    int i,index=0,random=0;
    int ran[5]={0};
    STU stu[N],r[N];
    input(stu, N);
    process(stu, N);
    srand((unsigned)time(NULL));
    while(index<5){
        random=rand()%80;
        ran[index]=random%100;
        index++;}
    for(i=0;i<5;i++)
    {r[i]=stu[ran[i]];}
    output(r, N);
    system("pause");
    return 0;
}
 
void input(STU s[], int n) {
    int i;
    FILE *fin;
 
    fin = fopen("list.txt", "r");
    if (fin == NULL) {
        printf("fail to open file\n");
        exit(0);
    }
 
    while (!feof(fin)) {
        for (i = 0; i < n; i++)
            fscanf(fin, "%ld %s %s", &s[i].id, s[i].name, &s[i].clas);
    }
 
    fclose(fin);
}
 
void output(STU s[], int n) {
    FILE *fout;
    int i;
    printf("\n");
    for (i = 0; i < 5; i++)
        printf("%ld\t\t%s\t%s\t\n", s[i].id, s[i].name, s[i].clas);
    fout = fopen("lucky.txt", "w");
    if (!fout) {
        printf("fail to open or create result.txt\n");
        exit(0);
    }
     
 
    for (i = 0; i < 5; i++)
        fprintf(fout, "%ld\t\t%s\t%s\t\t", s[i].id, s[i].name, s[i].clas);
    fclose(fout);
}
 
void process(STU s[], int n) {
    int i;
    for(i=0;i<N;i++)
        s[i].num=i;
     
}

运行截图

 

标签:ch,int,void,char,STU,实验,include
From: https://www.cnblogs.com/1qq2ww3ee/p/17476780.html

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