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C++ append

append函数是向string的后面追加字符或字符串。头文件是<string>.

1).向string的后面加C-string

string s = “hello “; const char *c = “out here “;

s.append(c); // 把c类型字符串s连接到当前字符串结尾

s = “hello out here”;

2).向string的后面加C-string的一部分

string s=”hello “;const char *c = “out here “;

s.append(c,3); // 把c类型字符串s的前n个字符连接到当前字符串结尾

s = “hello out”;

3).向string的后面加string

string s1 = “hello “; string s2 = “wide “; string s3 = “world “;

s1.append(s2); s1 += s3; //把字符串s连接到当前字符串的结尾

s1 = “hello wide “; s1 = “hello wide world “;

4).向string的后面加string的一部分

string s1 = “hello “, s2 = “wide world “;

s1.append(s2, 5, 5); 把字符串s2中从5开始的5个字符连接到当前字符串的结尾

s1 = “hello world”;

string str1 = “hello “, str2 = “wide world “;

str1.append(str2.begin()+5, str2.end()); //把s2的迭代器begin()+5和end()之间的部分连接到当前字符串的结尾

str1 = “hello world”;

5).向string后面加多个字符

string s1 = “hello “;

s1.append(4,’!’); //在当前字符串结尾添加4个字符!

s1 = “hello !!!!”;

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作者:wxn704414736

来源:CSDN

原文:https://blog.csdn.net/wxn704414736/article/details/78551886

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