实验七
实验三
给出了;生成;直观可读
实验四
输出了;直观可读
#include<stdio.h> #include<stdlib.h> #define N 10 typedef struct student { int num; char name[20]; int score; }STU; int main(){ FILE *fp; STU s[N] ; int i; fp=fopen("file4.dat","rb"); if(fp==NULL){ printf("wrong!!!!"); exit(0);} fread(s, sizeof(STU), N, fp); for(i=1;i<N;i++) { printf("%4d %10s %6d\n", s[i].num, s[i].name, s[i].score); } fclose(fp); return 0; }
#include <stdio.h> #include <string.h> #include <stdlib.h> const int N = 10; // 定义结构体类型struct student,并定义其别名为STU typedef struct student { long int id; char name[20]; float objective; float subjective; 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("录入%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: 准考证号,姓名,客观题得分,操作题得分,总分,等级\n"); 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) { // 补足代码 FILE *fin; int i; fin=fopen("examinee.txt","r"); if(!fin) { printf("fail to open examinee.txt.\n"); exit(0); } for(i=0;i<N;i++) { fscanf(fin,"%d%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) { // 补足代码 int i; FILE *fout; fout=fopen("result.txt","w"); if(!fout) { printf("fail to open result.txt.\n"); exit(0); } for(i=0;i<n;i++) { printf("%-8d%-8s%-6.2f%-6.2f%-4.2f%s\n",s[i].id,s[i].name,s[i].objective,s[i].subjective,s[i].sum,s[i].level); fprintf(fout,"%-8d%-8s%-6.2f%-6.2f%-4.2f%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) { // 补足代码 int i,j; STU t; for(i=0;i<n;i++) { s[i].sum=s[i].objective+s[i].subjective; } for(i=0;i<n-1;i++) { for(j=i+1;j<n;j++) { if(s[i].sum<s[j].sum) { t=s[j]; s[j]=s[i]; s[i]=t; } } } for(i=0;i<n;i++) { if(i<0.1*n) strcpy(s[i].level,"优秀"); else if(i>0.1*n&&i<0.5*n) strcpy(s[i].level,"合格"); else strcpy(s[i].level,"不合格"); } }