Task.4
程序:
#include <stdio.h> #include <string.h> int main(){ FILE *fp; fp=fopen("d:\\data4.txt","r"); if(fp==NULL){ printf("fail to open file to write\n"); return; } int a=0,c=0,i=0; char b[100]; while(!feof(fp)){ fgets(b,101,fp); a++; while(b[i]!=0){ if(b!='\n'&&b!=' ') c++; i++; } } fclose(fp); printf("data4.txt统计结果:\n"); printf("行数:%d\n",n); printf("字符数(不计算空白符):%d\n",); return 0; }
运行:
Task.5
程序:
#include <stdio.h> #include <string.h> #define N 10 typedef struct { long id; // 准考证号 char name[20]; // 姓名 float objective; // 客观题得分 float subjective; // 操作题得分 float sum; // 总分 char result[10]; // 考试结果 } STU; // 函数声明 void read(STU st[], int n); void write(STU st[], int n); void output(STU st[], int n); int process(STU st[], int n, STU st_pass[]); int main() { STU stu[N], stu_pass[N]; int cnt; double pass_rate; printf("从文件读入%d个考生信息...\n", N); read(stu, N); printf("\n对考生成绩进行统计...\n"); cnt = process(stu, N, stu_pass); printf("\n通过考试的名单:\n"); output(stu, N); // 输出所有考生完整信息到屏幕 write(stu, N); // 输出考试通过的考生信息到文件 pass_rate = 1.0 * cnt / N; printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100); return 0; } // 把所有考生完整信息输出到屏幕上 // 准考证号,姓名,客观题得分,操作题得分,总分,结果 void output(STU st[], int n) { int i; 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结果\n"); for (i = 0; i < n; i++) printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].result); } // 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 read(STU st[], int n) { int i; FILE *fin; fin = fopen("examinee.txt", "r"); if (!fin) { printf("fail to open file\n"); return; } while (!feof(fin)) { for (i = 0; i < n; i++) fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective); } fclose(fin); } void write(STU s[], int n) { int i; FILE *fp; fp=fopen("d:\\list_pass.txt","w"); if(fp=NULL){ printf("fail to open file to read\n"); return ; } fprintf(fp,"准考证号\t姓名\t客观题得分\t操作题得分\t总分\t结果\t"); for(i=0;i<n;++i){ if(s[i].sum>=60) fprintf(fp,"%d\t%s\t%.2f\t%.2f\t%.2f\t%s\n",s[i].id,s[i].name,s[i].objective,s[i].subjectives[i].sum,s[i].result); } fclose(fp);} int process(STU st[], int n, STU st_pass[]) { int i,j=0,sum=0; for(i=0;i<n;++i){ st[i].sum=st[i].objective+st[i].subjective; if(st[i].sum>=60){ strcpy(st[i].result,"通过"); st_pass[j++]=st[i]; sum++; } else strcpy(st[i].result,"不通过"); } return sum;} }
运行:
Task.6
程序:
#include <stdio.h> #include <stdlib.h> #include <time.h> # define N 80 typedef struct{ int id; char name[50]; char class[50]; }STU; void read(STU x[] ){ int i; FILE *fp; fp=fopen("d:\\list.txt","r"); if(fp==NULL){ printf("fail to open file to read"); return ;} while(!feof(fp)){ for(i=0;i<N;++i) fscanf(fp,"%d %s %s",&x[i].id,x[i].name,x[i].class); } fclose(fp); } void write(STU st[],char *a ){ int i; FILE *fp; fp=fopen(a,"w"); if(fp==NULL){ printf("fail to open file to write"); return ;} while(!feof(fp)){ for(i=0;i<5;++i) fprintf(fp,"%d %s %s",&st[i].id,st[i].name,st[i].class); } fclose(fp); } int main(){ STU x[N],st[5]; read(x); int b[5],i,j,sum=0; srand(time(0)); for(i=0;i<5;++i){ sum=rand()%80+1; b[i]=sum; } for(i=0;i<5;++i) for(j=0;j<N;++j){ if(x[j].id%100==x[i]){ st[i]=x[j]; continue; } } for(i=0;i<5;++i) printf("%-10d %-10s\n",st[j].id,st[j].name,st[j].class) printf("输入文本名:"); char a[100]; scanf("%99s",a); printf("保存成功"); write(st,a); return 0; }
运行:
标签:fp,int,st,STU,实验,printf,t% From: https://www.cnblogs.com/srjgandang223/p/18640121