task4
#include<stdio.h> #include<stdlib.h> int main(){ FILE *fp; char al; int count=0; fp=fopen("D://data4.txt","r"); if(fp==NULL){ printf("fail to open file\n"); return 1; } while(EOF!=(al=fgetc(fp))) { if(al!=13&&al!=32&&al!=9) count++; } printf("data4.txt中共包含字符数(不计空白符):%d",--count); fclose(fp); 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("D://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*0.4+s[i].subjective*0.6; } for(i=0;i<n;i++) { for(j=i;j<n-1;j++) { if(s[j].sum<s[j+1].sum) { t=s[j+1]; s[j+1]=s[j]; s[j]=t; } } } strcpy(s[0].level,"优秀"); for(i=1;i<5;i++) strcpy(s[i].level,"合格"); for(i=5;i<n;i++) strcpy(s[i].level,"不合格"); }
task6
#include <stdio.h> #include <string.h> #include <stdlib.h> #include<time.h> #define N 80 typedef struct { long int id; char name[N]; char clas[N]; } STU; void input(STU s[],int n); void output(STU s[],int n); int main() { STU stu1[80]; STU stu2[5]; int i,j; input(stu1,N); srand(time(NULL)); for(i=0;i<5;i++){ stu2[i].id=204942000+rand()%80+1; } for(i=0;i<5;i++) { for(j=0;j<80;j++) { if(stu1[j].id==stu2[i].id) stu2[i]=stu1[j]; } } output(stu2,5); return 0; } void input(STU s[],int n) { int i; FILE *fin; fin = fopen("D://list.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 %s", &s[i].id, s[i].name,s[i].clas); } fclose(fin); } void output(STU s[],int n) { FILE *fout; int i; for (i = 0; i < n; i++) printf("%ld\t\t%s\t\t%s\n", s[i].id, s[i].name, s[i].clas); fout = fopen("lucky.txt", "w"); if (!fout) { printf("fail to open or create lucky.txt\n"); exit(0); } for (i = 0; i < n; i++) fprintf(fout, "%ld\t\t%s\t\t%s\n", s[i].id, s[i].name, s[i].clas); fclose(fout); }
标签:fp,int,al,char,STU,实验,include From: https://www.cnblogs.com/pansiqi/p/17003013.html