#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> #include<stdlib.h> int main() { FILE* fp; int count = 0; fp = fopen("data4.txt", "r"); if (fp == NULL) { printf("fail to open the file"); return 1; } char ch; while ((ch = fgetc(fp)) != EOF) { if (ch != ' ' && ch != '\n' && ch != '\t') count++; } fclose(fp); printf("data4.txt中共包含字符数(不计空白符):%d", count); return 0; }
#define _CRT_SECURE_NO_WARNINGS #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("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; float 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 - 1 - i; j++) { if (s[j].sum < s[j + 1].sum) { t = s[j].sum; s[j].sum = s[j + 1].sum; s[j + 1].sum = t; } } for (i = 0; i < 0.1 * n; i++) strcpy_s(s[i].level, "优秀"); for (i = 0.1 * n; i < 0.5 * n; i++) strcpy_s(s[i].level, "合格"); for (i = 0.5 * n; i < n; i++) strcpy_s(s[i].level, "不合格"); }
标签:fp,ch,int,float,STU,实验,include From: https://www.cnblogs.com/hcguiwhcai/p/17005837.html