实验任务4
程序代码:
#include<stdio.h> #include<string.h> #include<stdlib.h> int main() { FILE *fp; char str[100]; int i,k=0,flag; while((fp=fopen("data4.txt","r"))==NULL) printf("fail to open"); do{ str[i++]=fgetc(fp); }while(str[i]!=EOF); for(i=0;str[i]!=EOF;i++){ flag=1; if(str[i]==13 || str[i]==10 || str[i]==32) flag=0; if(flag) k++; } fclose(fp); printf("data.4中包含的字符数(不计空白符):%d",k); return 0; }
运行结果:
实验任务5
程序代码:
#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("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,temp,k; for(i=0;i<n;i++){ s[i].sum=s[i].objective+s[i].subjective; } k=n; for(;k!=1;k--){ for(i=0;i<k;i++){ if(s[i].sum<s[i+1].sum){ temp=s[i+1].sum; s[i+1].sum=s[i].sum; s[i].sum=temp; } } } for(i=0;i<n;i++){ if((i+1)<=0.1*n) strcpy(s[i].level,"优秀"); else if((i+1)>0.1*n && (i+1)<=0.5*n) strcpy(s[i].level,"合格"); else strcpy(s[i].level,"不合格"); } // 补足代码 // ××× }
运行结果:
实验任务6
程序代码:
#include <stdio.h> #include <string.h> #include <stdlib.h> #include<time.h> #define N 80 int main(){ FILE *fin,*fout; typedef struct { long int id; char name[20]; char clas[50]; } STU; STU s[N]; int i; int a[4]; fin = fopen("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); srand((unsigned int)time(NULL)); for(i=0;i<4;i++){ a[i]=rand()%80+1; } fout = fopen("luck.txt", "w"); if (!fout) { printf("fail to open or create result.txt\n"); exit(0); } for (i = 0; i < 4; i++){ fprintf(fout, "%ld\t%s\t%s\n", s[a[i]].id, s[a[i]].name,s[a[i]].clas); printf("%ld\t%s\t%s\n",s[a[i]].id, s[a[i]].name,s[a[i]].clas); } fclose(fout); return 0; }
运行结果:
标签:int,char,STU,实验,str,include,fin From: https://www.cnblogs.com/685cxa/p/17467171.html