int number(int * x)
{
Return a value of return *x; // a
}
int main()
{
int a= 1;
int b;
b= number(&a);
}
In this case, if you copy the value of a to the variable b and return it, right?
But I wonder when and how the copy will be returned.
In my opinion, considering the return keyword as a variable,
Should I think about it this way?
return c c++
The first line of functions in language C consists of:
return value format function name (argument list);
In int number (int*x), the return value type is int. A function can return a specific value to the location where the function was called within the function, which is called a return value. If you don't want to use the return value, you can set the return value format to void. If you write a value after the return inside the function, the value becomes a return value and returns it to the place where the function was called.
Therefore, the main function is When number(&a) is called, the number function is executed, and *x, the value after the return inside the number function, becomes a return value and returns to the position of number(&a) in the main statement. Because the return value is int type, the number 1, which is the value of *x, is returned to the number (&a) position of the main function Eventually, b=number(&a) becomes b=1.
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