1 #include<stdio.h> 2 #include<stdlib.h> 3 int main() 4 { 5 int ch=0; 6 int a=0; 7 FILE *fp; 8 9 fp=fopen("data4.txt","r"); 10 11 if(fp==NULL){ 12 printf("fail to open\n"); 13 return 1; 14 } 15 while ((ch = fgetc(fp)) != EOF) { 16 if (!(ch == ' '|| ch == '\n')) { 17 a++; 18 } 19 } 20 21 fclose(fp); 22 23 printf("data4.txt中共包含字符数(不记空白符):%d\n",a); 24 system("pause"); 25 return 0; 26 }
1 #include <stdio.h> 2 #include <string.h> 3 #include <stdlib.h> 4 5 #define N 10 6 7 typedef struct { 8 long int id; 9 char name[20]; 10 float objective; // 客观题得分 11 float subjective; // 操作题得分 12 float sum; // 总分 13 char ans[10]; // 考试结果 14 } STU; 15 16 // 函数声明 17 void finput(STU st[], int n); 18 void foutput(STU st[], int n); 19 void output(STU st[], int n); 20 int process(STU st[], int n, STU st_pass[]); 21 22 int main() { 23 STU stu[N], stu_pass[N]; 24 int cnt; 25 double pass_rate; 26 27 printf("从文件读入%d个考生信息...\n", N); 28 finput(stu, N); 29 30 printf("\n对考生成绩进行统计...\n"); 31 cnt = process(stu, N, stu_pass); 32 33 printf("\n通过考试的名单:\n"); 34 output(stu_pass, cnt); // 输出到屏幕 35 foutput(stu_pass, cnt); // 输出到文件 36 37 pass_rate = 1.0 * cnt / N; 38 printf("\n本次等级考试通过率: %.2f%%\n", pass_rate*100); 39 system("pause"); 40 return 0; 41 } 42 43 // 把通过考试的考生完整信息输出到屏幕上 44 // 准考证号,姓名,客观题得分,操作题得分,总分,结果 45 void output(STU st[], int n) { 46 int i; 47 48 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结果\n"); 49 for (i = 0; i < n; i++) 50 printf("%ld\t\t%s\t%.2f\t\t%.2f\t\t%.2f\t\t%s\n", st[i].id, st[i].name, st[i].objective, st[i].subjective, st[i].sum, st[i].ans); 51 } 52 53 // 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 54 void finput(STU st[], int n) { 55 int i; 56 FILE *fin; 57 58 fin = fopen("examinee.txt", "r"); 59 if (fin == NULL) { 60 printf("fail to open file\n"); 61 exit(0); 62 } 63 64 while (!feof(fin)) { 65 for (i = 0; i < n; i++) 66 fscanf(fin, "%ld %s %f %f", &st[i].id, st[i].name, &st[i].objective, &st[i].subjective); 67 } 68 69 fclose(fin); 70 } 71 72 // 把通过考试的考生完整信息写入文件list_pass.txt 73 // 准考证号,姓名,客观题得分,操作题得分,总分,结果 74 void foutput(STU s[], int n) { 75 FILE *fout; 76 int i; 77 78 // 保存到文件 79 fout = fopen("list_pass.txt", "w"); 80 if (!fout) { 81 printf("fail to open or create list_pass.txt\n"); 82 exit(0); 83 } 84 85 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结果\n"); 86 87 for (i = 0; i < n; i++) 88 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].ans); 89 90 fclose(fout); 91 } 92 93 // 对考生信息进行处理:计算每位考生考试总分、结果;统计考试通过的人数 94 int process(STU st[], int n, STU st_pass[]) { 95 int i=0,j=0; 96 for(;i<n;i++){ 97 st[i].sum=st[i].objective+st[i].subjective; 98 if(st[i].sum>=60){ 99 strcpy(st[i].ans,"pass"); 100 st_pass[j++]=st[i]; 101 } 102 else 103 strcpy(st[i].ans,"Fail"); 104 } 105 return j; 106 107 }
1 #include<stdio.h> 2 #include<stdlib.h> 3 typedef struct { 4 long int id; 5 char name[20]; 6 char c[20]; // 考试结果 7 } STU; 8 9 int main(){ 10 int i=0,j=0,k; 11 STU st[100]; 12 FILE *fin; 13 FILE *fout; 14 fin=fopen("list.txt","r+"); 15 while (!feof(fin)) { 16 for ( int i = 0; i <=80.; i++) 17 fscanf(fin, "%ld %s %s", &st[i].id, st[i].name, st[i].c); 18 } 19 fclose(fin); 20 fout=fopen("lucky.txt","w"); 21 for(i=0;i<5;i++){ 22 k=rand()%80+1; 23 fprintf(fout, "%ld\t\t%s\t%s\n", st[k].id, st[k].name,st[k].c); 24 printf("%ld\t\t%s\t%s\n", st[k].id, st[k].name,st[k].c); 25 } 26 fclose(fout); 27 system("pause"); 28 return 0; 29 }
标签:int,printf,st,STU,实验,pass,t% From: https://www.cnblogs.com/klosohery/p/18264316