实验七
实验3
正确,生成
正确。
实验4
1:正确输出,生成,不直观可读
2:
#include <stdio.h> #include <stdlib.h> typedef struct student{ int num; char name[20]; int score; }STU; int main(){ FILE *fin; STU t[10]; fin=fopen("file4.dat","rb"); if(!fin){ printf("fail to open file4\n"); exit(0); } int i; fread(t,sizeof(STU),10,fin); fclose(fin); for(i=0;i<10;i++){ printf("%-6d%-10s%3d\n", t[i].num, t[i].name, t[i].score); } 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; /*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("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; } // 录入考生信息:准考证号,姓名,客观题得分,操作题得分 void input(STU s[], int n) { FILE *fin; int i; fin=fopen("examinee.txt","r"); if(!fin){ printf("fail to open the file\n"); exit(0); } 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 void output(STU s[], int n) { FILE *fout; fout=fopen("result.txt","w"); for (int i = 0; i < n; i++) { printf("%ld %s %.2f %.2f %.2f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective,s[i].sum,s[i].level ); fprintf(fout,"%ld %s %.2f %.2f %.2f %s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective,s[i].sum,s[i].level ); } } // 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) { for (int i = 0; i < n; i++) { s[i].sum = s[i].objective + s[i].subjective; if (s[i].sum < 60) { strcpy(s[i].level, "不合格"); } else if (s[i].sum < 80) { strcpy(s[i].level, "合格"); } else { strcpy(s[i].level, "优秀"); } } for (int i = 0; i < n - 1; i++) { STU temp ; for (int j = 0; j < n-1-i; j++) { if (s[j].sum < s[j + 1].sum) { temp = s[j]; s[j] = s[j + 1]; s[j + 1] = temp; } } } }