回答編集履歴
2
加筆
test
CHANGED
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@@ -27,3 +27,15 @@
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27
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```
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※ `sprintf(filename, "frame%04d.png", i);` の方が楽っちゅー
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[別解:sprintf使ったら負け]
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```C++
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string number = "00000"+to_string(i);
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imwrite("frame" + number.substr(number.size()-4) + ".png", img);
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```
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1
追記
test
CHANGED
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@@ -7,3 +7,23 @@
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7
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imwrite("picture"+to_string(i)+".png", img);
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8
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```
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[先手打って追記] 0詰め4桁
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```C++
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15
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#include <sstream>
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#include <iomanip>
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...
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ostringstream stream;
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stream << "frame" << setfill('0') << setw(4) << i << ".png";
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imwrite(stream.str(), img);
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27
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```
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29
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※ `sprintf(filename, "frame%04d.png", i);` の方が楽っちゅー
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