学生成绩系统C语言指针法实现（包含：统计学生总分、平均分、不及格人数）

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
#include<stdio.h>
#define MAX_LEN 100
int main()
{
    int i,step,Stu_Sum=0,Fail_Chinese_sum=0,Fail_Math_sum=0,Fail_English_sum=0;
    float Score_Chinese[MAX_LEN],Score_Math[MAX_LEN],Score_English[MAX_LEN];
    float *Pointer_Chinese,*Pointer_Math,*Pointer_English,Score_Chinese_Sum=0,Score_Math_Sum=0,Score_English_Sum=0;
    Pointer_Chinese=Score_Chinese;
    Pointer_Math=Score_Math;
    Pointer_English=Score_English;
    printf(" * * * * * * Student Score System * * * * * * nn");
    printf(" * * * * * * Now Please Follow Tip Input * * * * * * nn");
    printf("1.Input 1 Logging Student Score .nn");
    printf("2.Input 2 Statistics Student Sum Score And Average Score .nn");
    printf("3.Input 3 Statistics Fail Student .nn");
    printf("4.Input 4 Log Out System .nn");
    while(1)
    {
        printf("Input : ");
        scanf("%d",&step);
        printf("n");
        while(step<1||step>4)
        {
            printf("Input Error £¬Please Input Again .nn");
            scanf("%d",&step);
        }
        if(step==4) break;
        switch(step)
        {
            case 1:
                {
                    printf("Student Sum £º");
                    scanf("%d",&Stu_Sum);
                    printf("n * * * * * * Chinese Score * * * * * * nn");
                    for(i=0;i<Stu_Sum;i++)
                    {
                        scanf("%f",&Score_Chinese[i]);
                        Score_Chinese_Sum+=*Pointer_Chinese++;
                    }
                    printf("n * * * * * * Math Score * * * * * * nn");
                    for(i=0;i<Stu_Sum;i++)
                    {
                        scanf("%f",&Score_Math[i]);
                        Score_Math_Sum+=*Pointer_Math++;
                    }
                    printf("n * * * * * * English Score * * * * * * nn");
                    for(i=0;i<Stu_Sum;i++)
                    {
                        scanf("%f",&Score_English[i]);
                        Score_English_Sum+=*Pointer_English++;
                    }
                    Pointer_Chinese=Score_Chinese;
                    Pointer_Math=Score_Math;
                    Pointer_English=Score_English;
                }break;
            case 2:
                {
                    for(i=0;i<Stu_Sum;i++)
                    {
                        printf("Z 0 9 4 1 8 1 0 %d :Sum Score £º%.1f Average Score : %.2fnn",i+1,Pointer_Chinese[i]+Pointer_Math[i]+Pointer_English[i],(Pointer_Chinese[i]+Pointer_Math[i]+Pointer_English[i])/3);
                    }
                }break;
            case 3:
                {
                    for(i=0;i<Stu_Sum;i++)
                    {
                        if(Score_Chinese[i]<60) Fail_Chinese_sum++;
                        if(Score_Math[i]<60) Fail_Math_sum++;
                        if(Score_English[i]<60) Fail_English_sum++;
                    }
                    printf("Chinese Fail : %d People !nn",Fail_Chinese_sum);
                    printf("Math Fail : %d People !nn",Fail_Math_sum);
                    printf("English Fail : %d People !nn",Fail_English_sum);
                }break;
        }
        printf("n1.Input 1 Logging Student Score .nn");
        printf("2.Input 2 Statistics Student Sum Score And Average Score .nn");
        printf("3.Input 3 Statistics Fail Student .nn");
        printf("4.Input 4 Log Out System .nn");
    }
    printf(" * * * * * * Well Come You Back Again * * * * * * nn");
}