7.28日报

学习内容： 

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

void GetArray(char *a[], int length)
{
    int i;
    printf("Please input:\n");
    for (i = 0; i < length; i++)
    {
        a[i] = (char *)malloc(sizeof(char) * 64);
        scanf("%s", a[i]);
    }
}

void sort(char *a[], int length)
{
    int i, j;
    char *tmp;

    for (i = 1; i <= length - 1; i++)
    {
        for (j = 1; j <= length - i - 1; j++)
        {

            if ((atof(a[j + 1]) -atof(a[j])) < 0)
            {
                tmp = a[j + 1];
                a[j + 1] = a[j];
                a[j] = tmp;
            }
        }
    }
}

void print(char *a[], int length)
{
    int i;
    for (i = 1; i < length; i++)
    {
        printf("%s ", a[i]);
    }
    printf("\n");
}

int main(int argc, char *argv[])
{
    int i, j, tmp;

    int length = argc;



    sort(argv, length);

    print(argv, length);

    return 0;
}

atoi:all to int 将数字强制转换为整型

atof:all to float将数字强制转换为浮点型

转换后可以相减排序