为什么下面一行会产生错误？
for(int i = 0, int pos = 0, int next_pos = 0; i < 3; i++, pos = next_pos + 1) {
// …
}
error: expected unqualified-id before ‘int’
error: ‘pos’ was not declared in this scope
error: ‘next_pos’ was not declared in this scope
编译器是 g++。
最佳答案
每个语句只能有一种类型的声明，所以你只需要一个 int:
for(int i = 0, pos = 0, next_pos = 0; i < 3; i++, pos = next_pos + 1)
关于c++ - for循环中的逗号，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3383968/