task4
#include<stdio.h> int main(){ FILE *fp; fp=fopen("C:\\Users\\user\\Documents\\data4.txt","r"); if(feof(fp)){ printf("fail to open the file"); return 0; } int num=0; char ch; while((ch=fgetc(fp))!=EOF){ if(ch!=' '&&ch!='\n'&&ch!='\t') num++; } fclose(fp); printf("data4.txt中共包含字符数(不计空白符):%d",num); return 0; }
task5
#include <stdio.h> #include <string.h> #include <stdlib.h> #define N 10 typedef struct { 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("从文件读入%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, 并保存到文件中"); 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) { int i; FILE *fin; fin = fopen("C:\\Users\\user\\Documents\\examinee.txt", "r"); if (fin == NULL) { printf("fail to open file\n"); exit(0); } while (!feof(fin)) { 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) { FILE *fout; int i; // 输出到屏幕 printf("\n"); 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等级\n"); for (i = 0; i < n; i++) printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", s[i].id, s[i].name, s[i].objective, s[i].subjective, s[i].sum, s[i].level); // 保存到文件 fout = fopen("result.txt", "w"); if (!fout) { printf("fail to open or create result.txt\n"); exit(0); } fprintf(fout, "准考证号\t\t姓名\t客观题得分\t操作题得分\t总分\t\t等级\n"); for (i = 0; i < n; i++) fprintf(fout, "%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%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) { int i,j; STU t; for(i=0;i<n;i++){ s[i].sum=s[i].objective+s[i].subjective; } for(j=0;j<n-1;j++){ for(i=n-1;i>j;i--){ if(s[i].sum>s[i-1].sum) {t=s[i]; s[i]=s[i-1]; s[i-1]=t;} } } strcpy(s[0].level,"优秀"); for(i=1;i>=1&&i<5;i++) strcpy(s[i].level,"合格"); for(i=5;i>=5&&i<10;i++) strcpy(s[i].level,"不合格"); }
task6
#include<stdio.h> #include<time.h> #include<string.h> #include<stdlib.h> typedef struct { int num; char name[20]; char ban[20]; }STU; int main(){ FILE *fp,*fp1; STU s[80]; fp1=fopen("C:\\Users\\user\\Documents\\lucky.txt","w"); fp=fopen("C:\\Users\\user\\Documents\\list.txt","r"); if(feof(fp)){ printf("打开文件错误"); return 0; } int i; for(i=0;i<80;i++){ fscanf(fp,"%d%s%s",&s[i].num,s[i].name,s[i].ban); }fclose(fp); srand((unsigned int)time(NULL)); STU c[5]; int j,k; for(i=0;i<5;i++){ c[i].num=204942000+(rand()%80+1); } for(j=0;j<5;j++){ for(k=0;k<80;k++){ if(s[k].num==c[j].num) { c[j]=s[k]; } } } for(i=0;i<5;i++){ printf("%d\t%s\t%s\n",c[i].num,c[i].name,c[i].ban); fprintf(fp1,"%d\t%s\t%s\n",c[i].num,c[i].name,c[i].ban);} fclose(fp1); return 0; }
标签:fp,ch,int,char,STU,实验,include From: https://www.cnblogs.com/dubei/p/16995921.html