输入四个字符串然后按大到后输出。

#include "Head.c"
void main()
{
        char *ptr1[4];
        char str[4][20];
        char temp[20]; //定义指针数组，二维字符数组，用于交换的一维字符数组

        int i;
        int j ;

        for( i = 0; i < 4 ; i++ )
        {
                gets(str[i]); //输入四个字符串
        }//End for

        printf("/n");

        for( i = 0 ;i < 4 ; i++ )
        {
                ptr1[i] = str[i] ;
        }//End for;将二维数组首地址传递给指针数组的各指针

        printf("original string:/n");

        for(i = 0 ; i < 4 ; i++ )
        {
                printf("%s/n",ptr1[i]);
        }//End for;按行輸出原始各字符串

        for(i = 0 ; i < 3 ; i++ )
        {
                for(j = 0 ; j < 4 ; j++)
                {
                        if( strcmp(ptr1[j],ptr1[j+1]) > 0 )
                        {
                                strcpy(temp,ptr1[j]);
                                strcpy(ptr1[j],ptr1[j+1]);
                                strcpy(ptr1[j+1],temp);
                        }//进行大小比較。
                }//End for;
        }//End for

        for( i = 0 ; i < 4 ; i++ )
        {
                printf("%s/n",ptr1[i]);
        }//End for;輸出排序后的字符串

}//End main();