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Update ex9_38.cpp #795

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9650a1a
Update ex9_38.cpp
VeeeectorPan Jan 19, 2021
de530b0
Update README.md
VeeeectorPan Jan 29, 2021
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13 changes: 8 additions & 5 deletions ch09/ex9_38.cpp
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Expand Up @@ -5,14 +5,17 @@
//

#include <iostream>
#include <string>
#include <vector>

int main()
{
std::vector<std::string> v;
for (std::string buffer; std::cin >> buffer; v.push_back(buffer))
std::cout << v.capacity() << std::endl;

std::vector<int> ivec;
auto prev = ivec.capacity();
for (int i = 0; i < 128; ++i)
{
ivec.push_back(i);
if(prev != ivec.capacity())
cout << prev << "-> " << (prev = ivec.capacity()) << endl;
}
return 0;
}
2 changes: 2 additions & 0 deletions ch13/README.md
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Expand Up @@ -133,6 +133,8 @@ Yes, it does. Because, as described, the newly defined copy constructor can hand
>What if the parameter in f were const numbered&? Does that change the output? If so, why? What output gets generated?

Yes, the output will change. Because no copy operation happens within function `f`. Thus, the three Output are the same.
//NO!!!,they are not same.


## Exercise 13.17
> Write versions of numbered and f corresponding to the previous three exercises and check whether you correctly predicted the output.
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