#include<stdio.h> #define _CRT_SECURE_NO_WARNINGS #include<stdlib.h> int main(){ char ch; int count=0; FILE *fp; fp=fopen("data4.txt","r"); if(fp==NULL) { printf("fail to open file"); return 1; } ch=fgetc(fp); while(ch!=EOF) { if(ch!=' '&&ch!='\n'&&ch!=' ') count++; ch=fgetc(fp); } printf("data4.txt中共包含字符数(不计空白符): %d",count); fclose(fp); system("pause"); return 0; }
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#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; int 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[i].level, "优秀"); for (i = 0.1 * n; i < 0.5 * n; i++) strcpy(s[i].level, "合格"); for (i = 0.5 * n; i < n; i++) strcpy(s[i].level, "不合格"); }
#define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <string.h> #include <stdlib.h> #include<time.h> typedef struct { long int no; char name[20]; char class[20]; } STU; int main() { STU stu[80]; int i,j; FILE* fin; fin = fopen("list.txt", "r"); if (fin == NULL) { printf("fail to open file\n"); exit(0); } while (!feof(fin)) { for (i = 0; i < 80; i++) fscanf(fin, "%ld %s %s", &stu[i].no, stu[i].name, stu[i].class); } fclose(fin); FILE* fout; STU lucky[5]; srand((unsigned int)time(NULL)); for (i = 0; i < 5; i++) { lucky[i].no = 204942000 + (rand() % 80 + 1); } for (i = 0; i < 5; i++) { for (j = 0; j < 80; j++) { if (lucky[i].no == stu[j].no) lucky[i] = stu[j]; } } for (i = 0; i < 5; i++) printf("%ld\t%s\t%s\n", lucky[i].no, lucky[i].name, lucky[i].class); fout = fopen("lucky.txt", "w"); if (!fout) { printf("fail to open or create lucky.txt\n"); exit(0); } for (i = 0; i < 5; i++) { fprintf(fout, "%ld\t%s\t%s\n", lucky[i].no, lucky[i].name, lucky[i].class); } fclose(fout); return 0; }
标签:ch,int,++,lucky,STU,实验,include From: https://www.cnblogs.com/wgc20030213/p/17001764.html