TEST4
#include<stdio.h> #include<stdlib.h> int main(){ int num=0; char ch; FILE *fp; fp=fopen("data4.txt","r"); if(fp==NULL) {printf("fail\n"); return 1;} while(!feof(fp)) { ch=fgetc(fp); printf("%c",ch); if(ch!=' ' && ch!=' ' && ch!='\n') num++; } num--; fclose(fp); printf("\ndata4.txt中包含的字符数:%d\n",num); system("pause"); 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); system("pause"); 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("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(i=0;i<n-1;i++) for(j=0;j<n-i-1;j++) if(s[j].sum <s[j+1].sum ){ t=s[j]; s[j]=s[j+1]; s[j+1]=t;} for(i=0;i<n;i++){ if(i<n*0.1) strcpy(s[i].level ,"优秀"); else if(i>=n*0.1 &&i<n*0.5) strcpy(s[i].level ,"合格"); else strcpy(s[i].level ,"不合格"); } }
TASK 6
#include<stdio.h> #include<stdlib.h> #include<string.h> #include<time.h> #define N 80 #define M 5 typedef struct{ int id; char name[20]; char cla[20]; }STU; void output(STU s[],int m); void input(STU s[],int n); int main(){ int i,j=0; STU s[N]; STU c[M]; input(s,N); srand(time(0)); for(i=0;i<M;i++){ j=rand()%N+1; c[i]=s[j]; } output(s,M); system("pause"); return 0; } void input(STU s[],int n){ int i=0; FILE *fin; fin=fopen("list.txt","r"); if(fin== NULL){ printf("fail\n"); exit(0);} while(!feof(fin)){ fscanf(fin,"%d %s %s",&s[i].id ,s[i].name ,s[i].cla); ++i;} fclose(fin); } void output(STU s[],int m){ int i; FILE *fout; fout=fopen("lucky.txt","w"); if(fout == NULL) {printf("fail\n"); exit(0);} for(i=0;i<m;i++) {fprintf(fout,"%d\t %s\t %s
\n",s[i].id ,s[i].name ,s[i].cla ); printf("%d\t %s\t %s\n",s[i].id ,s[i].name ,s[i].cla );} fclose(fout); }
标签:fp,ch,int,char,STU,实验,include From: https://www.cnblogs.com/cwpdpk/p/17467990.html