实验7
task4
程序源码:
#include <stdio.h> #include <string.h> int main() { int t = 0; char s[80]; FILE *fp; fp = fopen("C://Users//Administrator//Desktop//实验7//实验7数据文件及部分代码//data4.txt","r"); if(fp == NULL) { printf("fail to open the file\n"); return 1; } while(!feof(fp)) { fscanf(fp,"%s",s); t += strlen(s); } printf("data4.txt中共包含字符数(不计空白符):%d",t); fclose(fp); return 0; }
程序运行:
task5
实验源码:
#include <stdio.h> #include <string.h> #include <cstdlib> #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("C://Users//钟天航//Documents//Tencent Files//1062663622//FileRecv//MobileFile//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; for(i = 0;i < n; i++) { s[i].sum = s[i].objective + s[i].subjective; } for(i = 0;i < n; i++) { for(j = 0;j < n - i - 1; j++) { if(s[j].sum < s[j + 1].sum) { STU t; 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"); } }
实验运行:
task6
实验源码
#include <stdio.h> #include <string.h> #include <stdlib.h> #include<time.h> #define N 80 typedef struct { long int id; char name[20]; char clas[100]; int num; } 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() { int i,index=0,random=0; int ran[5]={0}; STU stu[N],r[N]; input(stu, N); process(stu, N); srand((unsigned)time(NULL)); while(index<5){ random=rand()%80; ran[index]=random%100; index++;} for(i=0;i<5;i++) {r[i]=stu[ran[i]];} output(r, N); system("pause"); return 0; } void input(STU s[], int n) { int i; FILE *fin; fin = fopen("C://Users//钟天航//Documents//Tencent Files//1062663622//FileRecv//MobileFile//list.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 %s", &s[i].id, s[i].name, &s[i].clas); } fclose(fin); } void output(STU s[], int n) { FILE *fout; int i; printf("\n"); for (i = 0; i < 5; i++) printf("%ld\t\t%s\t%s\t\n", s[i].id, s[i].name, s[i].clas); fout = fopen("lucky.txt", "w"); if (!fout) { printf("fail to open or create result.txt\n"); exit(0); } for (i = 0; i < 5; i++) fprintf(fout, "%ld\t\t%s\t%s\t\t", s[i].id, s[i].name, s[i].clas); fclose(fout); } void process(STU s[], int n) { int i; for(i=0;i<N;i++) s[i].num=i; }
实验运行