实验五

实验五

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

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

}Book;

int main()
{
    Book x[N] = { {"一九八四","乔治.奥威尔"},
        {"美丽新世界","赫胥黎"},
        {"昨日的世界","斯蒂芬.茨威格"},
        {"万历十五年","黄仁宇"},
        {"一只特立独行的猪","王小波"}
    };

    int i;
    FILE* fp;

    fp = fopen("data1.txt", "w");

    if (fp == NULL)
    {
        printf("fail 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;
}

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

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

}Book;

int main()
{
    Book x[N];
    int i;

    FILE* fp;
    fp = fopen("data1.txt", "r");

    if (fp == NULL)
    {
        printf("fail to open file\n");
        return 1;
    }

    for (i = 1; i < N; ++i)
    {
        fscanf(fp, "%s %s\n", x[i].name, x[i].author);
        printf("-20s %-20s\n", x[i].name, x[i].author);
    }


    fclose(fp);

    return 0;


}

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

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

}Book;
int main()
{
    Book x[N] = { {"一九八四","乔治.奥威尔"},
        {"美丽的新世界","赫胥黎"},
        {"昨日的世界","斯蒂芬.茨威格"},
        {"万历十五年","黄仁宇"},
        {"一只特立独行的猪","王小波"}
    };

    int i;
    FILE* fp;

    fp = fopen("data2.dat", "wb");

    if (fp == NULL)
    {
        printf("fail to open file\n");
        return 1;
    }
    fwrite(x, sizeof(Book), N, fp);
    fclose(fp);

    return 0;

}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#define N 5
#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("fail to open file\n");
        return 1;
    }

        fread(x, sizeof(Book), N, fp);

        for (i = 0; i < N; ++i)
            printf("%-20s%-20s\n", x[i].name, x[i].author);

        fclose(fp);
        return 0;
}

#include <stdio.h>
int main()
{
int i=0;
FILE*fp;
char ch;
fp=fopen("data3_1.txt","r");
if(fp==NULL)
{
    printf("fail to find file\n");
    return 1;
}

while ((ch=fgetc(fp))!=EOF)
{
    if(ch!='\n'&&ch!=' '&&ch!='\t')
    i++;
}

printf("data3_1.txt中共包含字符数：%d",i);

fclose(fp);

return 0;
}

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define N 10
typedef struct
{
    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("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;
}

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);
}

void output(STU s[], int n)
{
    FILE* fout;
    int i;

    
    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);
    
    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);
}
void process(STU s[], int n)
{
    int i, j;
    STU t[10];
    for (i = 0; i < n; i++)
    {
        s[i].sum = s[i].subjective + s[i].objective;
    }
    for (j = 1; j < n * n / 2; j++)
    {
        for (i = 0; i < n - 1; i++)
        {
            if (s[i].sum < s[i + 1].sum)
            {
                t[i] = s[i];
                s[i] = s[i + 1];
                s[i + 1] = t[i];
            }

        }
    }
    i = 0;
    while (i < n)
    {
        if (i == 0)
            strcpy(s[i].level, "优秀");
        else if (i >= 1 && i <= 4)
            strcpy(s[i].level, "合格");
        else
            strcpy(s[i].level, "不合格");
        i++;
    }
}

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define N 5
#define M 80
typedef struct
{
    char xuehao[20];
    char name[20];
    char classm[20];
}lucky;

int main()
{
    int i, j;
    lucky s[M];
    FILE* fin;
    FILE* fout;

    srand(time(0));

    fin = fopen("list.txt", "r");
    if (fin == NULL)
    {
        printf("fail to open file\n");
        return 1;
    }

    for (i = 0; i < M; i++)
    {
        fscanf(fin, "%s %s %s\n", s[i].xuehao, s[i].name, s[i].classm);
    }

    fout = fopen("lucky.txt", "w");
    if (fout == NULL)
    {
        printf("fail to open file\n");
        return 1;
    }

    for (i = 0; i < N; i++)
    {
        j = rand() % (80) + 1;
        printf("%-20s %-20s %-20s\n", s[j].xuehao, s[j].name, s[j].classm);
        fprintf(fout, "%-20s %-20s %-20s\n", s[j].xuehao, s[j].name, s[i].classm);
    }
    fclose(fin);
    fclose(fout);
    system("pause");

}

 

标签：fp,20s,name,int,char,实验,define
来源： https://www.cnblogs.com/dyMDPF/p/16350371.html