c++ - For循环中的多个计数器问题

Question

为什么这是无效的

for( int i = 0, int x = 0; some condition; ++i, ++x )

这是

int i, x;
for( i = 0, x = 0; some condition; ++i, ++x )

谢谢

Answer 1

when you need to declare two variables of different types, it can't be done by one declaration

Hackety hack:

for (struct {int i; char c;} loop = {0, 'a'}; loop.i < 26; ++loop.i, ++loop.c)
{
    std::cout << loop.c << '\n';
}

;-)