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实验7

时间:2023-06-10 17:02:20浏览次数:54  
标签:fp 源代码 int char 实验 include define

实验任务1

task1_1

源代码

#include<stdio.h>
#define N 7
#define M 80

typedef struct{
    char name[M];
    char author[M];
}Book;

int main(){
    Book x[N]={{"《雕塑家》","斯科特.麦克劳德"},
               {"《灯塔》", "克里斯多夫.夏布特"},
               {"《五号屠宰场》", "库尔特.冯内古特"}, 
               {"《出卖月亮的人》", "罗伯特.海因莱茵"},
               {"《大地之上》", "罗欣顿·米斯特里"}, 
               {"《上学记》", "何兆武"}, 
               {"《命运》", "蔡崇达"}};
    int i;
    
    FILE *fp;
    
    fp=fopen("datal.txt","w");
    
    if(fp==NULL){
        printf("faill to open file\n");
        return 1;
    }
    
    for(i=0;i<N;++i){
        fprintf(fp,"%-20s %-20s\n",x[i].name,x[i].author);
        printf("%-20s %-20s\n",x[i].name,x[i].author);
    }
    
    fclose(fp);
    
    return 0;
} 

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task1_2

源代码

#include<stdio.h>
#define N 10
#define M 80

typedef struct{
    char name[M];
    char author[M];
}Book;

int main(){
    Book x[N];
    int i,n;
    FILE *fp;
    
    fp=fopen("datal.txt","r");
    
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    
    i=0;
    while(!feof(fp)){
        fscanf(fp,"%s%s",x[i].name,x[i].author);
        ++i;
    }
    n=i-1;
    
    for(i=0;i<n;++i)
        printf("%d. %-20s%-20s\n",i+1,x[i].name,x[i].author);
        
    fclose(fp);
    
    return 0;
}

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实验任务2

task2_1

源代码

#include<stdio.h>
#define N 7
#define M 80

typedef struct{
    char name[M];
    char author[M];
}Book;

int main(){
    Book x[N]={{"《雕塑家》","斯科特.麦克劳德"},
               {"《灯塔》", "克里斯多夫.夏布特"},
               {"《五号屠宰场》", "库尔特.冯内古特"}, 
               {"《出卖月亮的人》", "罗伯特.海因莱茵"},
               {"《大地之上》", "罗欣顿·米斯特里"}, 
               {"《上学记》", "何兆武"}, 
               {"《命运》", "蔡崇达"}};
    int i;
    
    FILE *fp;
    
    fp=fopen("data2.dat","wb");
    
    if(fp==NULL){
        printf("faill to open file\n");
        return 1;
    }
    
    fwrite(x,sizeof(Book),N,fp);
    fclose(fp);
    
    return 0;
}

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task2_2

源代码

#include<stdio.h>
#define N 7
#define M 80

typedef struct{
    char name[M];
    char author[M];
}Book;

int main(){
    Book x[N];
    int i;
    
    FILE *fp;
    
    fp=fopen("data2.dat","rb");
    
    if(fp==NULL){
        printf("faill to open file\n");
        return 1;
    }
    
    fread(x,sizeof(Book),N,fp);
    
    for(i=0;i<N;++i)
        printf("%d. %-20s%-20s\n",i+1,x[i].name,x[i].author);
        
    fclose(fp);
    
    return 0;
}

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实验任务3

task3_1

源代码

#include<stdio.h>
#define N 5
#define M 80

int main(){
    char songs[N][M]={"working\'s Blues","Everything will Flow","Streets of London","Perfect Day","Philadelphia"};
    int i;
    FILE *fp;
    
    fp=fopen("data3.txt","w");
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    
    for(i=0;i<N;++i){
        fputs(songs[i],fp);
        fputs("\n",fp);
    }
    
    fclose(fp);
    return 0;
} 

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task3_2

源代码

#include<stdio.h>
#define N 5
#define M 80

int main(){
    char songs[N][M];
    int i;
    FILE *fp;
    
    fp=fopen("data3.txt","r");
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    
    for(i=0;i<N;++i)
        fgets(songs[i],80,fp);
        
    for(i=0;i<N;++i)
        printf("%d. %s",i+1,songs[i]);
        
    fclose(fp);
    return 0;
}

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task3_3

源代码

#include<stdio.h>

int main(){
    char ch;
    FILE *fp;
    
    fp=fopen("data3.txt","r");
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    
    ch=fgetc(fp);
    while(ch!=EOF){
        putchar(ch);
        ch=fgetc(fp);
    }
    
    fclose(fp);
    return 0;
}

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实验任务4

源代码

#include<stdio.h>

int main(){
    char ch;
    int i=0;
    FILE *fp;
    fp=fopen("data4.txt","r");
    
    if(fp==NULL){
        printf("fail to open file\n");
        return 1;
    }
    
    while((ch=fgetc(fp))!=EOF){
        if(ch!=' '&&ch!='\n'&&ch!='\t')
            i=i+1;
    }
    
    
    fclose(fp);
    printf("data4.txt中共包含字符数(不计空白符):%d",i);
    return 0;
}

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实验任务5

源代码

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

#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) {
    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<n*0.1)
            strcpy(s[i].level,"优秀");
        else if(i<n*0.5)
            strcpy(s[i].level,"合格");
        else
            strcpy(s[i].level,"不合格");
    }
}

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实验任务6

源代码

 

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define N 5
#define M 80

typedef struct{
    long int num;
    char name[M];
    char class[M];
}STU;

int main(){
    STU s[M];
    int i;
    int x[N];
    
    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<M;i++)
            fscanf(fin,"%ld %s %s",&s[i].num,s[i].name,s[i].class);
    }
    srand(time(NULL));
    for(i=0;i<N;i++){
        x[i]=1+rand()%80;
    }
    fclose(fin);
    
    FILE *fout;
    
    for(i=0;i<N;i++){
        printf("%ld\t\t%s\t\t%s\n",s[x[i]].num,s[x[i]].name,s[x[i]].class);
    }
    
    fout=fopen("lucky.txt","w");
    if(!fout){
        printf("fail to open or creat lucky.txt\n");
        exit(0);
    }
    for(i=0;i<N;i++)
        fprintf(fout,"%ld\t\t%s\t\t%s\n",s[x[i]].num,s[x[i]].name,s[x[i]].class); 
    fclose(fout);
}

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标签:fp,源代码,int,char,实验,include,define
From: https://www.cnblogs.com/yuetong/p/17466973.html

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