task4
1 #include<stdio.h> 2 int main(){ 3 FILE *fp; 4 long count=0; 5 char t; 6 if((fp=fopen("data4.txt","r"))==NULL){ 7 printf("error\n"); 8 return 1; 9 } 10 while(!feof(fp)){ 11 t=fgetc(fp); 12 if(t==' '||t=='\n'||t=='\t')continue; 13 if(t==EOF)break; 14 count++; 15 } 16 printf("data4.txt中共包含字符数(不含空白符):%d",count); 17 return 0; 18 }View Code
task5
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, N); // 输出到屏幕 35 foutput(stu, N); // 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 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 94 95 // 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 96 int process(STU st[], int n, STU st_pass[]) { 97 int i,c=0; 98 for(i=0;i<N;++i){ 99 st[i].sum=st[i].objective+st[i].subjective; 100 if(st[i].sum>=60){ 101 strcpy(st[i].ans,"pass"); 102 c++; 103 } 104 else 105 strcpy(st[i].ans,"fail"); 106 } 107 return c; 108 }View Code
task7
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<time.h> 4 #define N 5 5 #define N1 1 6 #define N2 80 7 typedef struct { 8 long number; 9 char name[20]; 10 char classname[100]; 11 } STU; 12 void output(STU st[], int n); 13 void finput(STU st[], int n); 14 void randluck(STU st[], int n, STU lucky[]); 15 int main(){ 16 STU stu[N2], lucky[N2]; 17 finput(stu, N2); 18 randluck(stu,N,lucky); 19 output(lucky,N); 20 return 0; 21 } 22 void finput(STU st[], int n){ 23 int i; 24 FILE *fin; 25 fin = fopen("list.txt", "r"); 26 if (fin == NULL) { 27 printf("fail to open file\n"); 28 exit(0); 29 } 30 while (!feof(fin)) { 31 for (i = 0; i < n; i++) 32 fscanf(fin, "%ld %s %s", &st[i].number, st[i].name, st[i].classname); 33 } 34 fclose(fin); 35 } 36 void randluck(STU st[], int n, STU lucky[]){ 37 FILE *fout; 38 int i,j; 39 STU a; 40 // 保存到文件 41 fout = fopen("lucky.txt", "w"); 42 if (!fout) { 43 printf("error\n"); 44 exit(0); 45 } 46 srand(time(0)); 47 for(i = 0; i < n; ++i) 48 lucky[i].number=204942000+rand()%(N2 - N1 + 1) + N1; 49 for(i=0;i<n;++i) 50 for(j=0;j<N2;++j) 51 if(lucky[i].number==st[j].number) 52 lucky[i]=st[j]; 53 for(i=0;i<n-1;i++){ 54 for(j=0;j<n-i-1;j++){ 55 if(lucky[j].number>lucky[j+1].number){ 56 a=lucky[j]; 57 lucky[j]=lucky[j+1]; 58 lucky[j+1]=a; 59 } 60 } 61 } 62 for (i = 0; i < n; i++) 63 fprintf(fout, "%ld%s%s",lucky[i].number,lucky[i].name,lucky[i].classname); 64 65 fclose(fout); 66 } 67 void output(STU st[], int n){ 68 int i; 69 for(i=0;i<n;i++){ 70 printf("%ld\t%s\t%s",st[i].number,st[i].name,st[i].classname); 71 printf("\n"); 72 } 73 }View Code
标签:int,void,lucky,st,STU,实验,fin From: https://www.cnblogs.com/zjl-love-wsx/p/17904001.html