I recently faced an issue due the fact that I didn't placed an 'int' before the looping for a vector that was constructed. It works without (int) sometimes but this time It gave warnings. Can someone explain this behavior. Thankyou.
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I recently faced an issue due the fact that I didn't placed an 'int' before the looping for a vector that was constructed. It works without (int) sometimes but this time It gave warnings. Can someone explain this behavior. Thankyou.
Название |
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The function
size()
's return type issize_t
which is an unsigned int.So, for example, if you do
v.size() - 1
for an empty vector(size = 0) it will not result in -1 but some large number.Maybe you did something similar to this.
This doesn't answer your question, but it's pretty common to define a macro
#define sz(c) int((c).size())
to avoid underflow issues without having to putint()
all over the place. Alternatively, in C++20 you can usessize(c)
(see cppreference), which returns the size in a signed type.