WebThe statement using namespace std is generally considered bad practice. The alternative to this statement is to specify the namespace to which the identifier belongs using the … WebThe errors are being caused by the fact that you have not included the necessary headers in the Contact.h file. You need to include the following headers in that file: #include . #include "Name.h". You also need to add the necessary forward declarations for the Name and Contact classes: class Name; class Contact;
[Solved]-Unknown type name in open source project-C++
WebDec 30, 2024 · 1. It can be used with any operator, the resulting type being unknown-type (except in type conversion expressions and when using unknown-type as the first operand of the conditional operator, in which case the resulting type should be as usual). This includes using the value of unknown-type as a function in a function call expression. 2. WebApr 19, 2016 · Upgraded to r12, and got errors like 'mutex' in namespace 'std' does not name a type. After using the workaround suggested by James Swift, I get undefined reference … golf standard crossword clue
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