实验任务4:
#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> int main() { FILE* fp; char ch; if ((fp = fopen("D:\\我的文件\\桌面\\data4.txt", "r")) == NULL) { printf("不能打开文件!\n"); exit(0); } int k = 0; ch = fgetc(fp); while (ch!=EOF) { if (ch != ' ' && ch != '\n'&&ch!='\t') k++; ch = fgetc(fp); } printf("data4.txt中共包含字符数(不计空白字符):%d\n", k); fclose(fp); system("pause"); return 0; }
实验任务5:
#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; // 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("D:\\我的文件\\桌面\\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("D:\\我的文件\\桌面\\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; for (i = 0; i < n; i++) s[i].sum = s[i].objective + s[i].subjective;//计算总分 STU t; for (i = 0; i < n - 1; i++)//排序 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 < 0.1 * n; i++)//确定等级 strcpy(s[i].level, "优秀"); for (i; i < 0.5 * n; i++) strcpy(s[i].level, "合格"); for (i; i < n; i++) strcpy(s[i].level, "不合格"); }
实验任务6:
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> int main() { typedef struct { long no; char name[20]; char clas[100]; } STU; STU list[80]; STU lucky[5]; int i, j; //打开文件list.txt并读入到结构体数组 FILE* fp1; fp1 = fopen("D:\\我的文件\\桌面\\list.txt", "r"); if (fp1 == NULL) { printf("不能打开文件\n"); exit(0); } while (!feof(fp1)) { for (i = 0; i < 80; i++) fscanf(fp1, "%ld%s%s", &list[i].no, list[i].name, list[i].clas); } fclose(fp1); srand(time(NULL)); for (i = 0; i < 5; i++) lucky[i].no = 204942000 + rand() % 80 + 1; //通过学号的对比找到luckydog for (i = 0; i < 5; i++) for (j = 0; j < 80; j++) { if (lucky[i].no == list[j].no) lucky[i] = list[j]; } //打开文件lucky准备接收luckydog FILE* fp2; fp2 = fopen("D:\\我的文件\\桌面\\lucky.txt", "w"); if (fp2 == NULL) { printf("不能打开文件\n"); exit(0); } //打印出luckydog并写入文件lucky中 for (i = 0; i < 5; i++) { fprintf(fp2, "%ld\t%s\t%s\n", lucky[i].no, lucky[i].name, lucky[i].clas); printf("%ld\t%s\t%s\n", lucky[i].no, lucky[i].name, lucky[i].clas); } fclose(fp2); return 0; }
标签:ch,int,list,lucky,STU,实验,include From: https://www.cnblogs.com/xfj04/p/17002762.html