条件操作符--exp1?exp2:exp3

exp1为真，执行exp2

exp1为假，执行exp3

取最大值

int main()

{

int a = 10;

int b = 20;

int max = 0;

max = (a > b ? a : b);

//if (a > b)

// max = a;

//else

// max = b;

printf("max=%d\n", max);

return 0;

}