demo_3_18

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
void fun(int *s, int n1, int n2)
{
    int i, j, t;
    i = n1;
    j = n2;
    while (i < j)
    {
        t = s[i];
        s[i] = s[j];
        s[j] = t;
        i++;
        j--;
    }
}
int main()
{
    int a[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 }, k;
    fun(a, 0, 3);
    fun(a, 4, 9);
    fun(a, 0, 9);
    for (k = 0; k < 10; k++)
    {
        printf("%d", a[k]);
    }
    printf("\n");
    system("pause");
    return 0;
}


int main()
{
    int a[4][4] = { { 1, 4, 3, 2 }, { 8, 6, 5, 7 }, { 3, 7, 2, 5 }, { 4, 8, 6, 1 } }, i, k, t;
    for (i = 0; i < 3; i++)
    {
        for (k = i + 1; k < 4; k++)
        {
            if (a[i][i] < a[k][k])
            {
                t = a[i][i];
                a[i][i] = a[k][k];
                a[k][k] = t;
            }
        }
    }
    for (i = 0; i < 4; i++)
    {
        printf("%d", a[0][i]);
    }
    printf("\n");
    system("pause");
    return 0;
}