task4
#include <stdio.h> #include <string.h> #define N 5 #define M 80 int main() { char songs[N][M]; FILE* fp; fp = fopen("data1.txt", "r"); if (fp == NULL) { printf("fail to open file\n"); return 1; } int t = 0; char h; while (1) { h = fgetc(fp); if (h == EOF) { break; } else if (h == ' ' || h == '\n') { continue; } else { t++; } } printf("文件内字符数为%d\n", t); fclose(fp); return 0; }
task5
#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; // 总分 char ans[10]; // 考试结果 } STU; // 函数声明 void finput(STU st[], int n); void foutput(STU st[], int n); void output(STU st[], int n); int process(STU st[], int n, STU st_pass[]); int main() { STU stu[N], stu_pass[N]; int cnt; double pass_rate; printf("从文件读入%d个考生信息...\n", N); finput(stu, N); printf("\n对考生成绩进行统计...\n"); cnt = process(stu, N, stu_pass); printf("\n通过考试的名单:\n"); output(stu, N); // 输出到屏幕 foutput(stu, N); // 输出到文件 pass_rate = 1.0 * cnt / N; printf("\n本次等级考试通过率: %.2f%%\n", pass_rate * 100); return 0; } // 把通过考试的考生完整信息输出到屏幕上 // 准考证号,姓名,客观题得分,操作题得分,总分,结果 void output(STU st[], int n) { int i; 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结果\n"); for (i = 0; i < n; i++) printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].ans); } // 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 finput(STU st[], 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", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective); } fclose(fin); } // 把通过考试的考生完整信息写入文件list_pass.txt // 准考证号,姓名,客观题得分,操作题得分,总分,结果 void foutput(STU s[], int n) { FILE* fout; int i; // 保存到文件 fout = fopen("list_pass.txt", "w"); if (!fout) { printf("fail to open or create list_pass.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结果\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].ans); fclose(fout); } // 对考生信息进行处理:计算每位考生考试总分、结果;统计考试通过的人数 int process(STU st[], int n, STU st_pass[]) { FILE* fscore; int cnt = 0; fscore = fopen("list_pass.txt", "r"); for (int i = 0; i < n; i++) { st[i].sum = st[i].objective + st[i].subjective; } for (int i = 0; i < n; i++) { if (st[i].sum >= 60) { strcpy(st[i].ans, "pass"); cnt++; } else { strcpy(st[i].ans, "fail"); } } return cnt; }
task6
#include <stdio.h> #include <stdlib.h> #include <string.h> #define N 80 typedef struct { int id; char name[20]; char class[100]; }info; void finput(info stu[], int n) { FILE* fp; fp = fopen("list.txt", "r"); while (!feof(fp)) { for (int i = 0; i < N; i++) { fscanf(fp, "%d%s%s", &stu[i].id, stu[i].name, stu[i].class); } } fclose(fp); } void output(info stu[], int n) { for (int i = 0; i < n; i++) printf("%d\t%s\t%s\n", stu[i].id, stu[i].name, stu[i].class); } void translate(info stu[], info sts[], int n) { srand((unsigned)time(NULL)); int judge[80] = { 0 }; for (int i = 0; i < 5; i++) { int j = rand() % 80 + 1; if (judge[j] == 1) { i--; continue; } sts[i].id = stu[j].id; strcpy(sts[i].name, stu[j].name); strcpy(sts[i].class, stu[j].class); judge[j] = 1; } } void sort(info sts[], int n) { for (int i = 0; i < 5; i++) { for (int j = i; j < 5; j++) { if (sts[i].id > sts[j].id) { int l = sts[i].id; sts[i].id = sts[j].id; sts[j].id = l; char p[100]; strcpy(p, sts[i].name); strcpy(sts[i].name, sts[j].name); strcpy(sts[j].name, p); } } } } int main() { info stu[N], sts[5]; finput(stu, N); output(stu, N); printf("\n"); translate(stu, sts, N); sort(sts, 5); output(sts, 5); return 0; }
标签:name,int,st,stu,实验,sts,id From: https://www.cnblogs.com/Obrez/p/17917725.html