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Upload note code of chapter4 sequence container

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	`1`	`+// filename: 4vector-test.cpp`
	`2`	`+`
	`3`	`+#include <vector>`
	`4`	`+#include <iostream>`
	`5`	`+#include <algorithm>`
	`6`	`+`
	`7`	`+using namespace std;`
	`8`	`+`
	`9`	`+inline void printInfo(vector<int> iv) {`
	`10`	`+ cout << "size=" << iv.size() << " capacity=" << iv.capacity() << endl;`
	`11`	`+`
	`12`	`+}`
	`13`	`+`
	`14`	`+void printVector(vector<int> iv) {`
	`15`	`+ for (int i = 0; i < iv.size(); i++) {`
	`16`	`+ cout << iv[i] << " ";`
	`17`	`+ }`
	`18`	`+ cout << endl;`
	`19`	`+}`
	`20`	`+`
	`21`	`+int main() {`
	`22`	`+ int i;`
	`23`	`+ vector<int> iv(2, 9);`
	`24`	`+ printInfo(iv);`
	`25`	`+`
	`26`	`+ for (int i = 1; i < 5; i++) {`
	`27`	`+ iv.push_back(i);`
	`28`	`+ printInfo(iv);`
	`29`	`+ }`
	`30`	`+`
	`31`	`+ printVector(iv);`
	`32`	`+`
	`33`	`+ iv.push_back(i);`
	`34`	`+ printInfo(iv);`
	`35`	`+ printVector(iv);`
	`36`	`+`
	`37`	`+ iv.pop_back();`
	`38`	`+ iv.pop_back();`
	`39`	`+ printInfo(iv);`
	`40`	`+`
	`41`	`+ iv.pop_back();`
	`42`	`+ printInfo(iv);`
	`43`	`+`
	`44`	`+ vector<int>::iterator ivite = find(iv.begin(), iv.end(), 1);`
	`45`	`+ if (ivite!=iv.end())`
	`46`	`+ iv.erase(ivite);`
	`47`	`+ printInfo(iv);`
	`48`	`+ printVector(iv);`
	`49`	`+`
	`50`	`+ ivite = find(iv.begin(), iv.end(), 2);`
	`51`	`+ if (ivite!=iv.end())`
	`52`	`+ iv.insert(ivite, 3, 7);`
	`53`	`+ printInfo(iv);`
	`54`	`+ printVector(iv);`
	`55`	`+`
	`56`	`+ iv.clear();`
	`57`	`+ printInfo(iv);`
	`58`	`+}`

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