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20 lines
428 B
20 lines
428 B
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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printf("hello world\n");
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//两种方式是等价
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cout << "a" << 1 << "b" << endl;
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printf("%s%d%s\n","a",1,"b");
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//将数字转为字符串
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ostringstream stream;
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stream << 1; //n为要转字符串的整数
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string s = stream.str();
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printf("a%sb\n", s.c_str());
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//转义
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printf("%s","%s");
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return 0;
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}
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