c语言数组小练习

//查找数组中最大的值：
#include<stdio.h>
int main01()
{
    int a[] = { 32, 654, 31, 75, 15, 984, 19, 33, 77, 22 ,736,11};
    int tmp = a[0];
    int i;
    for(i = 1;i < sizeof(a) / sizeof(a[0]);i++)
    {
        if(a[i] > tmp)
            tmp = a[i];
    }
    printf("max = %d",tmp);
    return 0;

}

//取出数组中第二大数：
int main02()
{
    int a[] = { 32, 654, 31, 75, 15, 984, 19, 33, 77, 22 ,736,11};
    int max = 0;
    int smax = 0;
    int i;
    (a[0] > a[1])?(max = a[0],smax = a[1]):(max = a[1],smax = a[0]);
    for(i = 2;i < sizeof(a) / sizeof(a[0]);i++)
    {
        if(a[i] > max)
        {
            smax = max;
            max = a[i];
        }
        else if(a[i] < max && a[i] > smax)
        {
            smax = a[i];
        }
        
    }
    printf("smax = %d
",smax);
    return 0;
    
}

//数组逆置
int main()
{
    int a[] = { 32, 654, 31, 75, 15, 984, 19, 33, 77, 22 ,736,11};
    //俩个元素交换的思路
    //int tmp = a[0];
    //a[0] = a[9];
    //a[9] = tmp;
    int min = 0;
    int max = 0;
    int i;
    max = sizeof(a) / sizeof(a[0]) - 1;
    while(min < max)
    {
        int tmp = a[min];
        a[min] = a[max];
        a[max] = tmp;
        min++;
        max--;
    }
    for(i = 0;i < sizeof(a) / sizeof(a[0]);i++)
    {
        printf("a[%d]=%d
",i,a[i]);
    }
    return 0;

}

//冒泡排序：
int main()
{
    int a[] = {32, 654, 31, 75, 15, 984, 19, 33, 77, 22 ,736,11};
    int i,j;
    int max = sizeof(a) / sizeof(a[0]);
    for(i = 0;i < max;i++)
    {
        for(j = 1;j < max - i;j++)
        {
            if(a[j-1] > a[j])//前面的元素大于后面的元素
            {
                int tmp = a[j-1];
                a[j-1] = a[j];
                a[j] = tmp;
            }
        }
    }
    for(i = 0;i < max;i++)
    {
        printf("a[%d] = %d
",i,a[i]);
    }
    return 0;
}