#include <stdlib.h>
#include <stdio.h>
int main()
{ FILE *fp;
int i=0;
char ch;
fp=fopen("D:\data4.txt","r");
if(fp==NULL)
{printf("fail\n");return 1;}
while(!feof(fp))
{ch=fgetc(fp);
if(ch>33)
i++;
}
fclose(fp);
printf("共包含字符数%d",i);
return 0 ;
}
#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,t; float sum=0; for(i=0;i<n;i++){ s[i].sum=s[i].objective+s[i].subjective; } for(i=0;i<n;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; } } int flag1=(float)(n)/10; int flag2=(float)(n)/2; for(i=0;i<n;i++){ if(i<flag1) strcpy(s[i].level,"优秀"); else{ if(i>flag2) strcpy(s[i].level,"不及格"); else strcpy(s[i].level,"合格"); } } }
#include <stdio.h> #include <time.h> #include <stdlib.h> #define N 100 int main() {FILE *fp; int i,k,j,flag[5]; char s[N][N]; fp=fopen("D:\list.txt","r"); for(i=0;i<80;i++) fgets(s[i],80,fp); fclose(fp); srand(time(NULL)); fp=fopen("lucky.txt","w"); for(i=0;i<5;i++) {k=rand()%(80+1);flag[i]=k; for(j=0;j<i;j++) {if(flag[i]==flag[j]) i--;} } for(i=0;i<5;i++) { printf("%s",s[flag[i]]); fprintf(fp,"%s",s[flag[i]]);} fclose(fp); return 0; }
标签:fp,ch,int,char,STU,实验,include From: https://www.cnblogs.com/ethereal-0/p/17467220.html