帮忙

#include<stdio.>
#include<windows.h>
int main()
{
    int row=10,column;
    while(row>=1){
       column=1;
       while(column<=10){
          printf("%s",row%2 ? "<" : ">");
          ++column;}
       --row;
       printf("\n");
       }
                  system("pause");
                  return 0;}
无法执行
说printf("%s",row%2 ? "<" : ">");这句不对?