test4.c
#include <stdio.h> void read(); int main(){ read(); return 0; } void read(){ FILE *fp; char ch; int cnt=0; int linecnt=1; fp=fopen("data4.txt","r"); if(fp==NULL){ printf("fail to open file to read\n"); return; } while((ch=fgetc(fp))!=EOF){ if(ch==' '||ch=='\t'||ch=='\n'){ if(ch=='\n'){ linecnt++; } }else{ cnt++; } } fclose(fp); printf("data4.txt统计结果:\n"); printf("行数:%-40d\n",linecnt); printf("字符数(不计空白符):%-40d\n",cnt); }
test5.c
#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); } // 把通过考试的考生完整信息写入文件list_pass.txt // 准考证号,姓名,客观题得分,操作题得分,总分,结果 void write(STU s[], int n) { int i; FILE *fp; fp = fopen("list_pass.txt", "w"); if(!fp){ printf("fail to open file\n"); return; } for(i=0;i<n;i++){ if(s[i].sum>=60){ fprintf(fp,"%ld\t\t%-10s\t%.2f\t\t%.2f\t\t%.2f\t\t%-10s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].result); } } fclose(fp); } // 对考生信息进行处理:计算每位考生考试总分、结果;统计考试通过的人数 int process(STU st[], int n, STU st_pass[]) { int cnt=0; int i,j=0; for(i=0;i<n;i++){ st[i].sum=st[i].objective+st[i].subjective; if(st[i].sum>=60){ cnt++; strcpy(st[i].result,"通过"); st_pass[j]=st[i]; j++; } else{ strcpy(st[i].result,"不通过"); } } return cnt; }
test6.c
#include <stdio.h> #include <stdlib.h> #include <time.h> #define N 80 typedef struct{ int id; char name[20]; char class[40]; }STU; void read(STU fomer[]){ int i; FILE *fin; fin = fopen("list.txt","r"); if(!fin){ printf("fail to open file\n"); return; } while(!feof(fin)){ for(i=0;i<N;i++){ fscanf(fin,"%d %s %s",&fomer[i].id,fomer[i].name,fomer[i].class); } } fclose(fin); } void write(STU st[],char *filename){ int i; FILE *fp; fp = fopen(filename,"w"); if(!fp){ printf("fail to open file\n"); return; } for(i=0;i<5;i++){ fprintf(fp,"%d %s %s\n",st[i].id,st[i].name,st[i].class); } fclose(fp); } int main(){ STU fomer[N]; STU st[5]; read(fomer); int x[5]; int i,j; int randnum=0; srand(time(NULL)); for(i=0;i<5;i++){ randnum=rand()%80+1; x[i]=randnum; } for(i=0;i<5;i++){ for(j=0;j<N;j++){ if(fomer[j].id%100==x[i]){ st[i]=fomer[j]; continue; } } } for(j=0;j<5;j++){ printf("%-10d %-10s %-10s\n",st[j].id,st[j].name,st[j].class); } printf("输入文本名:"); char filename[100]; scanf("%99s", filename); printf("保存成功"); write(st,filename); return 0; }
标签:int,st,STU,实验,printf,t%,fin From: https://www.cnblogs.com/-suntao-/p/18638930