#include<stdio.h> #include<stdlib.h> int main() { char s[100]; FILE *fp; int i = 0,j,k = 0; char ch; fp = fopen("data4.txt","rb"); if(fp == NULL) { printf("fail to open file\n"); return 1; } ch = fgetc(fp); while(ch!=EOF) { s[i++] = ch; ch = fgetc(fp); } for(j = 0;j<i-1;j++) if(s[j]!=' ') k++; fclose(fp); printf("data4.txt中共包含字符数(不计空白符):%d",k-1); system("pause"); return 0; }
#include <stdio.h> #include <string.h> #include <stdlib.h> #define N 10 typedef struct { long int id; char name[20]; float objective; float subjective; float sum; char level[10]; } STU; 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; } 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); } void output(STU s[], int n) { FILE *fout; int i; 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); 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); } void process(STU s[], int n) { int i,j,m=0; 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-1-i;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==0) strcpy(s[i].level ,"优秀"); else if(i>0&&i<4) strcpy(s[i].level,"合格"); else strcpy(s[i].level,"不合格"); } }
#include <stdlib.h> #include <stdio.h> #include <time.h> #define N 80 typedef struct { long int id; char name[N]; char classname[N]; }STU; void input (STU s[], int n); void process (STU s[], int n); int main() { STU stu[N]; input (stu, N); process (stu, N); system("pause"); return 0; } void input (STU s[], int n) { int i; 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< n;i++) fscanf(fin,"%ld %s %s",&s[i].id,s[i].name,s[i].classname); } fclose (fin); } void process (STU s[], int n) { int b[5]; int i; srand(time(NULL)); for (i = 0;i < 5; ++i) b[i] = rand()%80 + 1; for(i=0;i<5;i++) printf("%ld\t%s\t%s\n",s[b[i]].id,s[b[i]].name,s[b[i]].classname); FILE *fout; fout = fopen("lucky.txt","w"); if(!fout) { printf("fail to open or creat lucky.txt\n"); exit (0); } for(i=0;i<5;i++) fprintf(fout,"%ld\t%s\t%s\n",s[b[i]].id,s[b[i]].name,s[b[i]].classname); fclose(fout); }
标签:int,void,char,STU,实验,include,fin From: https://www.cnblogs.com/nbb233/p/17481844.html