C++ Header Guards: #pragma once vs #ifndef Explained
Header guards prevent multiple inclusion. The choice between #pragma once and traditional #ifndef guards is less about correctness and more about tradeoffs you can actually reason about.
#pragma once Developer T-Shirt
Black Heather / XS
£25.00
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£25.00
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#pragma once Developer T-Shirt
#pragma once tells the compiler to include a header file only once, however many times it's referenced. It does the same job as the older #ifndef / #define / #endif include-guard dance, in one line instead of three and with no chance of two headers colliding on the same guard name.
Not standard, technically — but supported everywhere that matters
£25.00
Sale price
£25.00
Regular price
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The fabric is slightly sheer and may appear see-through, particularly in lighter colours or bright lighting.
Printed on demand — each piece is made to order.
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