标签:txt tool ons can input copy oid roc oom
#include <stdio.h> #include <stdlib.h> #define N 10 typedef struct student { int num; char name[20]; int score; }STU; int main() { FILE *fin; STU st[N]; int i; if((fin=fopen("file4.dat","rb"))==NULL){ printf("cannot open file"); exit(0); } for(i=0;i<N;i++){ if(fread(&st[i],sizeof(struct student),1,fin)==1){ printf("%d %s %d\n",st[i].num,st[i].name,st[i].score); } } fclose(fin); return 0; }
实验5
#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; } // 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==NULL){ printf("fail to open 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 // 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 // ××× FILE *fout; int i; fout=fopen("result.txt","w"); if(fout==NULL){ printf("fail to open file\n"); exit(0); } for(i=0;i<n;i++){ printf("%23ld %9s %7.2lf %12.2lf %7.2lf %2s\n",s[i].id,s[i].name,s[i].objective,s[i].subjective,s[i].sum,s[i].level); fprintf(fout,"%23ld %9s %7.2lf %12.2lf %7.2lf %2s\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 // ××× FILE *fp; fp=fopen("examinee.txt","r"); if(fp==NULL){ printf("fail to open file\n"); exit(0);} int i,j; STU temp; temp=s[0]; for(i=0;i<n;i++){ s[i].sum=s[i].objective+s[i].subjective; if(s[i].sum<s[i+1].sum){ temp=s[i]; s[i]=s[i+1]; s[i+1]=temp; } } for(j=0;j<n;j++){ if(s[i].sum>=90) strcpy(s[j].level,"优"); else if(s[i].sum>=80) strcpy(s[j].level,"良"); else if(s[i].sum>=70) strcpy(s[j].level,"中"); else if(s[i].sum>=60) strcpy(s[j].level,"及格"); else strcpy(s[j].level,"不及格"); } fclose(fp);
标签:txt tool ons can input copy oid roc oom
原文地址:https://www.cnblogs.com/zhangfei181/p/14897444.html