回答編集履歴
1
追記
answer
CHANGED
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@@ -24,4 +24,27 @@
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24
24
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std::cout << '[' << line << "] -> [" << change(line) << "]\n";
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25
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}
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26
26
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}
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27
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```
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28
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29
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[追記] <cctype> 使えとの思し召しなら:
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30
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```C++
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31
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#include <iostream>
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32
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#include <string>
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33
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#include <algorithm>
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34
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#include <cctype>
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35
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36
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std::string change(const std::string& str) {
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37
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std::string result(str.size(),'\0');
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38
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std::transform(str.begin(), str.end(), result.begin(),
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39
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[](char ch) { return isupper(ch) ? tolower(ch) :
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40
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(islower(ch) ? toupper(ch) : ch); });
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41
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return result;
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42
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}
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44
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int main() {
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45
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std::string line;
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while ( std::getline(std::cin, line) && line.size() != 0 ) {
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47
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std::cout << '[' << line << "] -> [" << change(line) << "]\n";
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48
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}
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49
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}
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27
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```
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