function parameter passing in C/A + +

Mode One: Value passing

When a value is passed, another spatial storage function parameter is created as a temporary variable. This is true regardless of whether the pointer (array name) or normal variable is passed. When you pass a pointer variable (array name), the value of the original pointer does not change, but the content that the pointer points to is changed.

Way two: Quote

The reference is actually the alias of the original variable, so there is no additional storage space. The modification of the variable in the function will have a direct effect. If you want to not waste storage space and do not want variables to be modified, you can add a const.

function parameter passing in C/A + +