实验5
作者：互联网
1 #include <stdio.h>
2
3 #define N 5
4 #define M 80
5
6 typedef struct
7 {
8 char name[M];
9 char author[M];
10 }BOOK;
11
12 int main()
13 {
14 BOOK x[N]={{"一九八四","乔治·奥威尔"},{"美丽新世界","赫胥黎"},{"昨日的世界","斯提芬·茨威格"},{"万历十五年","黄仁宇"},{"一只特立独行的猫","王小波"}};
15 int i;
16
17 FILE *fp;
18
19 fp=fopen("data1.txt","w");
20
21 if(fp==NULL)
22 {
23 printf("fail to open file\n");
24 return 1;
25 }
26
27 for(i=0;i<N;i++)
28 {
29 fprintf(fp,"%-20s %-20s\n",x[i].name,x[i].author);
30 printf("%-20s %-20s\n",x[i].name,x[i].author);
31 }
32
33 fclose(fp);
34
35 return 0;
36 }
task1-2
1 #include <stdio.h>
2
3 #define N 5
4 #define M 80
5
6 typedef struct
7 {
8 char name[M];
9 char author[M];
10 }BOOK;
11
12 int main()
13 {
14 BOOK x[N];
15 int i;
16
17 FILE *fp;
18
19 fp=fopen("data1.txt","r");
20
21 if(fp==NULL)
22 {
23 printf("fail to open file\n");
24 return 1;
25 }
26
27 for(i=0;i<N;i++)
28 {
29 fscanf(fp,"%s %s\n",x[i].name,x[i].author);
30 printf("%-20s %-20s\n",x[i].name,x[i].author);
31 }
32
33 fclose(fp);
34
35 return 0;
36 }
task2-1
1 #include <stdio.h>
2
3 #define N 5
4 #define M 80
5
6 typedef struct
7 {
8 char name[M];
9 char author[M];
10 }BOOK;
11
12 int main()
13 {
14 BOOK x[N]={{"一九八四","乔治·奥威尔"},{"美丽新世界","赫胥黎"},{"昨日的世界","斯提芬·茨威格"},{"万历十五年","黄仁宇"},{"一只特立独行的猫","王小波"}};
15 int i;
16
17 FILE *fp;
18
19 fp=fopen("data2.dat","wb");
20
21 if(fp==NULL)
22 {
23 printf("fail to open file\n");
24 return 1;
25 }
26
27 fwrite(x,sizeof(BOOK),N,fp);
28
29 fclose(fp);
30
31 return 0;
32 }
task2-2
1 #include <stdio.h>
2
3 #define N 5
4 #define M 80
5
6 typedef struct
7 {
8 char name[M];
9 char author[M];
10 }BOOK;
11
12 int main()
13 {
14 BOOK x[N];
15 int i;
16
17 FILE *fp;
18
19 fp=fopen("data2.dat","rb");
20
21 if(fp==NULL)
22 {
23 printf("fail to open file\n");
24 return 1;
25 }
26
27 fread(x,sizeof(BOOK),N,fp);
28
29 for(i=0;i<N;i++)
30 printf("%-20s %-20s\n",x[i].name,x[i].author);
31
32 fclose(fp);
33
34 return 0;
35 }
task3
1 #include <stdio.h>
2
3 int main()
4 {
5 FILE *fin,*fout;
6 char ch;
7
8 fin=fopen("data3_1.txt","r");
9
10 if(fin==NULL)
11 {
12 printf("fail to open data3_1.txt\n");
13 return 1;
14 }
15
16 fout=fopen("data3_2.txt","w");
17
18 if(fin==NULL)
19 {
20 printf("fail to open data3_2.txt\n");
21 return 1;
22 }
23
24 while(!feof(fin))
25 {
26 ch=fgetc(fin);
27
28 if(ch>='a'&&ch<='z')
29 ch-=32;
30
31 fputc(ch,fout);
32 }
33
34 fclose(fin);
35 fclose(fout);
36
37 return 0;
38 }
task5
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4
5 #define N 10
6
7 typedef struct
8 {
9 long int id;
10 char name[20];
11 float objective;
12 float subjective;
13 float sum;
14 char level[10];
15 } STU;
16
17 void input(STU s[], int n);
18 void output(STU s[], int n);
19 void process(STU s[], int n);
20
21 int main()
22 {
23 STU stu[N];
24
25 printf("浠从文件读入%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);
26 input(stu, N);
27
28 printf("\n对考生信息进行处理: 计算总分，确定等级\n");
29 process(stu, N);
30
31 printf("\n打印考生完整信息, 并保存到文件中");
32 output(stu, N);
33
34 return 0;
35 }
36
37 void input(STU s[], int n)
38 {
39 int i;
40 FILE *fin;
41
42 fin = fopen("examinee.txt", "r");
43 if (fin == NULL)
44 {
45 printf("fail to open file\n");
46 exit(0);
47 }
48
49 while (!feof(fin))
50 {
51 for (i = 0; i < n; i++)
52 fscanf(fin, "%ld %s %f %f", &s[i].id, s[i].name, &s[i].objective, &s[i].subjective);
53 }
54
55 fclose(fin);
56 }
57
58 void output(STU s[], int n)
59 {
60 FILE *fout;
61 int i;
62
63 printf("\n");
64 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");
65 for (i = 0; i < n; i++)
66 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);
67
68 fout = fopen("result.txt", "w");
69 if (!fout)
70 {
71 printf("fail to open or create result.txt\n");
72 exit(0);
73 }
74
75 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");
76
77 for (i = 0; i < n; i++)
78 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);
79
80 fclose(fout);
81 }
82
83 void process(STU s[], int n)
84 {
85 int i,j;
86 STU temp;
87 char level[4][10]={"优秀","合格","不合格"};
88
89 for(i=0;i<n;i++)
90 s[i].sum=s[i].objective+s[i].subjective;
91
92 for(i=0;i<n-1;i++)
93 for(j=n-1;j>i;j--)
94 if(s[j].sum>s[j-1].sum)
95 {
96 temp=s[j];
97 s[j]=s[j-1];
98 s[j-1]=temp;
99 }
100
101 for(i=1;i<=n;i++)
102 {
103 if(i<=0.1*n)
104 strcpy(s[i-1].level,level[0]);
105 else if(i<=0.5*n)
106 strcpy(s[i-1].level,level[1]);
107 else strcpy(s[i-1].level,level[2]);
108 }
109 }
task6
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 #include <time.h>
5
6 #define N 80
7 #define M 5
8
9 typedef struct
10 {
11 long int id;
12 char name[20];
13 char classes[20];
14 } STU;
15
16 void input(STU s[], int n);
17 void output(STU s[], int n);
18 void process(STU s[], int n, STU z[], int m);
19
20 int main()
21 {
22 STU stu[N],lucky[M];
23
24 input(stu, N);
25
26 process(stu, N, lucky, M);
27
28 output(lucky, M);
29
30 return 0;
31 }
32
33 void input(STU s[], int n)
34 {
35 int i;
36 FILE *fin;
37
38 fin = fopen("list.txt", "r");
39 if (fin == NULL)
40 {
41 printf("fail to open file\n");
42 exit(0);
43 }
44
45 while (!feof(fin))
46 {
47 for (i = 0; i < n; i++)
48 fscanf(fin, "%ld %s %s", &s[i].id, s[i].name, s[i].classes);
49 }
50
51 fclose(fin);
52 }
53
54 void output(STU s[], int n)
55 {
56 FILE *fout;
57 int i;
58
59 printf("\n");
60 printf("学号\t\t姓名\t班级\n");
61 for (i = 0; i < n; i++)
62 printf("%ld\t%s\t%s\n", s[i].id, s[i].name, s[i].classes);
63
64 fout = fopen("lucky.txt", "w");
65 if (!fout)
66 {
67 printf("fail to open or create lucky.txt\n");
68 exit(0);
69 }
70
71 fprintf(fout, "学号\t\t姓名\t班级\n");
72
73 for (i = 0; i < n; i++)
74 fprintf(fout, "%ld\t%s\t%s\n", s[i].id, s[i].name, s[i].classes);
75
76 fclose(fout);
77 }
78
79 void process(STU s[], int n, STU z[], int m)
80 {
81 srand(time(NULL));
82 int num[m], i, j;
83
84 for(i = 0; i < m; i++)
85 {
86 num[i] = rand() % (n-1);
87 for(j = i; j > 0; j--)
88 if(num[j-1] == num[i])
89 i--;
90 }
91 for(i = 0; i < m; i++)
92 {
93 j=num[i];
94 z[i]=s[j];
95 }
96 }
标签：fp,int,char,STU,实验,include,fin 来源： https://www.cnblogs.com/tamotamo/p/16350335.html