#include iostream #include string using namespace std; int main(){ string s="abcde"; coutsendl; string s1(3,'a'); couts1endl; string s2({'a','b','c','d','e'}); couts2endl; string str="abcde"; string s3(str); couts3endl; char c4[]="abcdefghi

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#include iostream #include string #include sstream using namespace std; /*bool com(char c){ return (c-'0')%2; }*/ int main(){ //常量 npos 字符串终点 coutstring::nposendl; string s="abc"; if(s.find('d')==string::npos){ cout"no 'd' in

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#include iostream #include string using namespace std; int main(){ string s="abcdefghijk"; //capacity 当前对象分配的内存空间 couts.capacity()endl; s="abcde"; //size/length 返回字符数 couts.size()" "s.length()endl; //max_size

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#include iostream #include string using namespace std; int main(){ string s="abcdefghijklmnopqrstuvwxyz"; //front 访问首字符 couts.front()endl; //back 访问最后的字符 couts.back()endl; //data 返回访问首字符的指针 auto i

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