#include "stdafx.h"
#include "stdio.h"
void out_student(char (*p)[20],int n); char (*p)[20]Data pointer (row pointer)
void sort_student(char (*p)[20],int n);
int main()
{char students[3][20];
int i;
for(i=0; i<3; i++)
scanf("%s",*(students+i)); Entered
out_student(students,3);
sort_student(students,3);
out_student(students,3);
return 0;
}
void out_student(char (*p)[20],int n) //(*p) line address
{int i;
for(i=0; i<n; i++)
printf("%s",*(p+i));
printf("\n");
}
//选择排序
void sort_student(char (*p)[20],int n)
{int i,j;
for(i=0; i<n-1; i++)
{int pos=i;
for(j=i+1; j<n; j++)
{if(strcmp(*(p+j),*(p+pos)<0)) //strcmp(*(p+j),*(p+pos)<0) *(p+j) cannot be a row address, it must be a column address, the first address of a first-order array
{pos=j; }
}
}
if(pos!=i)
{char str[20]={'\0'};
strcpy(str,*(p+pos)); *(p+pos) The address of the first column of the pos line, the swap string
strcpy(*(p+pos),*(p+i));
strcpy(*(p+i),str);
}
}
//总结：
/*二维数组表示（行地址，列地址）
The pointer traverses the array
2D character array (row address, column address) */
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Posted on 12/14/2015 3:27:26 PM
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