单选题：How many times will the loop be executed?

How many times will the loop be executed?
```
#include
int main()
{
int a=0;
while (a=0)
{
printf("%d",a);
a--;
}
return 0;
}
```

@[C](1)

A. countless
B. 1
C. 0
D. Syntax error




A.countless
B.1
C.0
D.Syntax error


答案：C