通过取模 来为三元运算 提供 真假

#include <stdio.h>

int main(){
    int row = 10, column;

    while (row >= 1){
        column = 1;
        while (column <= 10){
            printf("%s", row % 2 ? "<<<<<" : ">>>>>");
            column++;
        }
        printf("\n");
        row--;
    }
    return 0;
}