string中查找某个字符 C++
时间: 2024-04-25 11:25:14 浏览: 20
在C++中,可以使用string类的find()函数来查找字符串中是否存在某个字符。该函数的语法如下:
```cpp
size_t find (const string& str, size_t pos = 0) const noexcept;
```
其中,str是要查找的字符,pos是查找的起始位置,默认为0。该函数返回字符在字符串中的位置,如果找不到则返回string::npos。
以下是一个示例代码:
```cpp
#include <iostream>
#include <string>
using namespace std;
int main() {
string s = "Hello, World!";
char c = 'o';
size_t index = s.find(c);
if (index != string::npos) {
cout << "Character found at index: " << index << endl;
} else {
cout << "Character not found" << endl;
}
return 0;
}
```
在上述代码中,我们定义了一个字符串s和一个字符c,然后使用s.find(c)来查找字符c在字符串s中的位置。如果找到了,就输出该位置;如果找不到,则输出"Character not found"。
#### 引用[.reference_title]
- *1* [C++,string怎样判断字符串里面是否含有某个字符串?](https://blog.csdn.net/kekezhu0000/article/details/129689470)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [c++ string类字符串查找](https://blog.csdn.net/qq_45797026/article/details/108359461)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]