实验七

task 4

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    FILE *fp;
    int line=0,len=0;
    char ch[1000];
    char c;
    fp=fopen("C:\\Users\\wenov\\Desktop\\data4.txt","r"); 
    while(fgets(ch,sizeof(ch),fp)!=NULL)
    {
        line++;
    }
    rewind(fp);
    while((c=fgetc(fp))!=EOF)
    {
        if(c!=' ')
        len++;
    }
    len=len-(line-1);
    fclose(fp);
    printf("data4.txt统计结果：\n");
    printf("行数：\t%d\n",line);
    printf("字符数(不计空白符)：\t%d",len);
    return 0;
}

 

task 5

 

task6

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>
#define N 100
int main()
{
    char s[N][N],signal[N]={0};
    int i, n=80, num;
    char name[100],luckydog[5][100];
    FILE* fp;
    FILE* fp1;
    fp = fopen("C:\\Users\\wenov\\Desktop\\task6\\list.txt","r+");
    if (!fp) {
        perror("list.txt");
        return 1;
    }
    for (i = 0; i < n; i++)
    {
        fgets(s[i], N, fp);
    }
    srand((unsigned)time(NULL));
    printf("------中奖名单------\n"); 
    for (int k = 0; k < 5; k++)
    {    
        num = rand() % 80 + 1;
        if(signal[num]==0)
        {
            signal[num]=1;
            strcpy(luckydog[k],s[num]);
            printf("%s", s[num]);
        }
        else 
        {
            k--;
        }
    }
    printf("--------保存到文件-------\n"); 
    printf("输入文件名：");
    gets(name);
    fp1=fopen(name,"w+");
    for(int k=0;k<5;k++)
    {
        fprintf(fp1,"%s",luckydog[k]);
    }
    printf("保存成功！");
    fclose(fp);
    return 0;
}