size_t f2=strd.find_first_not_of(s_fmt_a);if(f2 == std::string::npos){ std::cout<<"strd NOT find"<<std::endl; }else{ std::cout<<"strd find at:"<< f2 <<std::endl; } size_t f3=stre.find_first_not_of(s_fmt_a);if(f3 == std::string::npos){ std::cout<<"stre ...
start finding first unmatched character. // CPP code for string::find_first_not_of// (const string& str, size_type idx) const#include<iostream>usingnamespacestd;// Function to demonstratefind_first_not_ofvoidfind_first_not_ofDemo(stringstr1,stringstr2){// Finds first character in str1 f...
std::string.find_first_not_of是C++标准库中的一个字符串查找函数,用于在给定字符串中查找第一个不在指定字符集合中的字符,并返回其位置。 该函数的原型如下: 代码语言:cpp 复制 size_t find_first_not_of (const string& str, size_t pos = 0) const noexcept; 参数说明: str:要查找的字符...
// string::find_first_not_of#include <iostream>// std::cout#include <string>// std::string#include <cstddef>// std::size_tintmain () { std::string str ("look for non-alphabetic characters..."); std::size_t found = str.find_first_not_of("abcdefghijklmnopqrstuvwxyz ");if(found...
cout << s4.find_first_not_of(s3, 1) << endl; cout << s4.find_first_not_of(s3, 1, 5) << endl; string s5("mabcdefghij"); cout << (n = s5.find_first_not_of(s3, 1)) << endl; if(n == string::npos) cout << "not found diffence string::npos" << endl; ...
假设没找到就返回string::nops O(N^2) int MyString::find_first_not_of(const char *str,size_t index) { if(NULL == str || index >=strLength) return npos; size_t i=0,j=0; size_t tmp_len = strlen(str); for(i=index;i<strLength;i++) { for(;j<tmp_len;j++) { if(p_...
size_type find_first_not_of(const value_type* _Ptr,size_type _Off,size_type _Count) const;中的msdn 中说的不是很清楚? 相关知识点: 试题来源: 解析 _Count从以_Off开始查找第_Count次出现的不属于_Ptr中的字符索引数.例如:str = "444-555-GGG"str.find_first_not_of ( "45G", 0 );返回第...
string类find_first_not_of ()方法 #include <string> #include <iostream> using namespace std; int main() { string strFirst ( "abced" ),strSecond("abc abc abd def"); cout<<strFirst.find("a")<<endl;//输出结果为0,说明a当前的索引位置为0...
C++ String::find_first_not_of() function - The C++ std::string::find_first_not_of() function is used to locate the first character in the string that does not match any character from a specified set. It takes a string or a character set as its parameter
size_t find_first_not_of ( const char* s, size_t pos, size_t n ) const;n是s中的字符数...