------
## 最终结论
```python
def pos_count(numbers):
    count = 0
    for num in numbers:
        if num > 0:
            count += 1
    return count

# Test cases
assert pos_count([1,-2,3,-4]) == 2
assert pos_count([3,4,5,-1]) == 3
assert pos_count([1,2,3,4]) == 4
```