三元条件 ?: objective c 示例
ternary conditional ?: objective c example
我是 objective c 的新手。以下代码来自我搜索过的 GCC:
int a = b ?: c;
这相当于
if (!b) //if b variable its not zero
{
a=b;
}
else
{
a=c;
}
我想的对吗?
比如我声明了默认的b
和c
变量:
int b = 0;
int c = 1;
int a = b ?: c;
a = 1
in this case. Otherwise, if b is not zero a will take b as a result.
它将等于:
if (!b) {
a = c;
} else {
a = b;
}
我是 objective c 的新手。以下代码来自我搜索过的 GCC:
int a = b ?: c;
这相当于
if (!b) //if b variable its not zero
{
a=b;
}
else
{
a=c;
}
我想的对吗?
比如我声明了默认的b
和c
变量:
int b = 0;
int c = 1;
int a = b ?: c;
a = 1
in this case. Otherwise, if b is not zero a will take b as a result.
它将等于:
if (!b) {
a = c;
} else {
a = b;
}