As an old programmer accustomed to writing in C, type conversion in C can be described as simple and straightforward. Regardless of the type, you can directly convert it by adding parentheses, even if the resulting type is completely unrelated to the original. The compiler will not throw an error. This mechanism gives programmers ample room to maneuver, but conversely, it also makes it easier to introduce various subtle errors. When problems arise, they are often difficult to troubleshoot.
Take the following example:
float f = 3.14;int* p = (int*)&f; // C-style forced conversionThe compiler won’t say anything, but it is highly likely to cause issues at runtime — the memory layout of floating-point and integer pointers is fundamentally different! It’s like trying to force a watermelon into a beer bottle; it may seem possible, but applying any force will cause it to explode.
In C++, to avoid such dangerous