c语言数组那些骚事儿

找出最大和第二大值
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{
    int mynum[] = {, , , , , , ,,,};
    int max=;
    printf("%d\n", max);
    int smax=;
    printf("%d\n", smax);
    if (mynum[] > mynum[])
    {
        max = mynum[];
        smax = mynum[];
    }
    else
    {
        max = mynum[];
        smax = mynum[];
    }
    for (int i = ; i < ; i++)
    {
        if (max < mynum[i])
        {
            smax = max;
            max = mynum[i];
        }
        else if ((mynum[i]<max) && (mynum[i]>smax))
        {
            smax = mynum[i];
        }
    }
    printf("%d\n",max);
    printf("%d\n", smax);
    system("pause");
}

• 数组的逆序----思想是第一个和最后一个，第二个和倒数第二个

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
    int mynum[] = { , , , , , , , , ,  };
    int cnt = sizeof(mynum) / ;
    printf("%d\n",cnt);
    for (int i = ; i < cnt/; i++)
    {
        int temp = mynum[i];
        mynum[i] = mynum[cnt - i - ];
        mynum[cnt - i - ] = temp;
    }
    for (int i = ; i < ; i++)
    {
        printf("%d,", mynum[i]);
    }
    system("pause");
    return EXIT_SUCCESS;
}

• 字符串逆序，------目前只能应用于中间带空格的英文字符串

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
    char mywords[] = "hello world";
    int cnt;
    cnt = sizeof(mywords)-;
    printf("%d\n",cnt);
    for (int i = ; i < cnt/; i++)
    {
        if (i == )
        {
        }
        else
        {
            char temp = mywords[i];
            mywords[i] = mywords[cnt - i - ];
            mywords[cnt - i - ] = temp;
        }

    }
    for (int i = ; i < sizeof(mywords); i++)
    {
        printf("%c", mywords[i]);
    }
    system("pause");
    return EXIT_SUCCESS;
}