string::find( char c, size_type pos = 0 ) returns the index of the first occurrence of c in the string beginning at index pos. string::substr( size_type pos = 0, size_type n = npos ) returns the substring of n characters beginning from, and including, the character at index 'pos...
cout<< str.find('a',0) << endl;//1cout << str.find_first_of('a',0) << endl;//1 str.find_first_of('a', 0)与str.find('a', 0)//测试size_type find_first_of (const basic_string& str, size_type pos = 0) const noexcept;stringstr1("bcgjhikl");stringstr2("kghlj"); ...
// C program to find the first capital letter // in a string without using recursion #include <stdio.h> int main() { char str[64]; char cap = 0; int i = 0; printf("Enter string: "); scanf("%[^\n]s", str); while (str[i] != 0) { if (str[i] >= 'A' && st...
2、string构造函数 void test01() { string s1;//默认构造 const char* str = "hello world"; string s2(str); cout << "s2=" << s2 << endl; string s3(s2); cout << "s3=" << s3 << endl; string s4(10, 'a');//10个a cout << "s4=" << s4 << endl; } 3、string赋值...
int find(const string &s, int pos = 0) const;//从pos开始查找字符串s在当前串中的位置 //查找成功时返回所在位置，失败返回string::npos的值 int rfind(char c, int pos = npos) const;//从pos开始从后向前查找字符c在当前串中的位置 int rfind(const char *s, int pos = npos) ...
find("2", n); (gdb) s std::string::find (this=0xbfb54a10, __s=0x804b8f2 "2", __pos=4294967295) at /usr/include/c++/4.1.2/bits/basic_string.h:1579 1579 return this->find(__s, __pos, traits_type::length(__s)); (gdb) s std::char_traits::length (__s=0x804b8f2 ...
查找失败返回string::npos int find_first_not_of(char c, int pos = 0) const; int find_first_not_of(const char *s, int pos = 0) const; int find_first_not_of(const char *s, int pos,int n) const; int find_first_not_of(const string &s,int pos = 0) const; //从当前串中...
find函数在C++的头文件basic_string.h中有四种定义,定义如下: 2.1)第一个定义:size_type find(const _CharT* __s, size_type __pos, size_type __n) const; /** * @brief Find position of a C substring. * @param __s C string to locate. ...
vector<int> res, cnt(128,0);intns = s.size(), np = p.size(), i =0;for(charc : p) ++cnt[c];while(i <ns) {boolsuccess =true; vector<int> tmp =cnt;for(intj = i; j < i + np; ++j) {if(--tmp[s[j]] <0) { ...
1. Usingstring::rfind The standard approach to find the index of the last occurrence of a char in a string is using thestring::rfindmember function. If the character doesn’t occur in the string, the function returnsstring::npos.