c语言 12

1、

1.1

#include <stdio.h>
#include <string.h>

#define NUMBER 5
#define NAME_LEN 64

typedef struct{
    char name[NAME_LEN];
    int height;
    float weight;
    long schols;
}Student;

void swap(Student *x, Student *y)
{
    Student tmp = *x;
    *x = *y;
    *y = tmp;    
} 

void sort(Student x[], int n)
{
    int i, j;
    for(i = 0; i < n - 1; i++)
    {
        for(j = n - 1; j > i; j--)
        {
            if(x[j - 1].height > x[j].height)
            {
                swap(&x[j - 1], &x[j]);
            }
        }
    }
}

int main(void)
{
    int i;
    Student stu[NUMBER];
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("NO.%d.name = ", i + 1); scanf("%s", stu[i].name);
        printf("NO.%d.height = ", i + 1); scanf("%d", &stu[i].height);
        printf("NO.%d.weight = ", i + 1); scanf("%f", &stu[i].weight);
        printf("NO.%d.schols = ", i + 1); scanf("%ld", &stu[i].schols);
    } 
    
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("%-8s %7d %7.2f %7ld
", stu[i].name, stu[i].height, stu[i].weight, stu[i].schols);
    }
    
    sort(stu, NUMBER);
    puts("
================================
");
    for(i = 0; i < NUMBER; i++)
    {
        printf("%-8s %7d %7.2f %7ld
", stu[i].name, stu[i].height, stu[i].weight, stu[i].schols);
    }
    return 0;
}

1.2

#include <stdio.h>
#include <string.h>

#define NUMBER 5
#define NAME_LEN 64

typedef struct{
    char name[NAME_LEN];
    int height;
    float weight;
    long schols;
}Student;

void swap(Student *x, Student *y)
{
    Student tmp = *x;
    *x = *y;
    *y = tmp;    
} 

void sort_int(Student x[], int n)
{
    int i, j;
    for(i = 0; i < n - 1; i++)
    {
        for(j = n - 1; j > i; j--)
        {
            if(x[j - 1].height > x[j].height)
            {
                swap(&x[j - 1], &x[j]);
            }
        }
    }
}

void sort_str(Student x[], int n)
{
    int i, j;
    for(i = 0; i < n - 1; i++)
    {
        for(j = n - 1; j > i; j--)
        {
            if(strcmp(x[j - 1].name,x[j].name) > 0)
            {
                swap(&x[j - 1], &x[j]);
            }
        }
    }
}

int main(void)
{
    int i;
    Student stu[NUMBER];
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("NO.%d.name = ", i + 1); scanf("%s", stu[i].name);
        printf("NO.%d.height = ", i + 1); scanf("%d", &stu[i].height);
        printf("NO.%d.weight = ", i + 1); scanf("%f", &stu[i].weight);
        printf("NO.%d.schols = ", i + 1); scanf("%ld", &stu[i].schols);
    } 
    
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("%-8s %7d %7.2f %7ld
", stu[i].name, stu[i].height, stu[i].weight, stu[i].schols);
    }
    
    int j;
    puts("choose: j = 1, sort by height;  j = 2, sort by name.");
    printf("j = "); scanf("%d", &j);
    
    switch(j)
    {
        case 1: sort_int(stu, NUMBER); break;
        case 2: sort_str(stu, NUMBER); break;
    }
    
    puts("
================================
");
    for(i = 0; i < NUMBER; i++)
    {
        printf("%-8s %7d %7.2f %7ld
", stu[i].name, stu[i].height, stu[i].weight, stu[i].schols);
    }
    return 0;
}