C++中strrchr的使用示例有哪些

1. 找到字符串中最后一个特定字符的位置：

#include <
    iostream>
    
#include <
    cstring>


int main() {
    
    const char* str = "Hello, world!";
    
    char ch = 'o';
    
    
    const char* lastOccurrence = strrchr(str, ch);

    
    if (lastOccurrence != NULL) {
    
        std::cout <
    <
     "Last occurrence of '" <
    <
     ch <
    <
     "' is at position " <
    <
     lastOccurrence - str <
    <
     std::endl;

    }
 else {
    
        std::cout <
    <
     "Character '" <
    <
     ch <
    <
     "' not found in the string." <
    <
     std::endl;

    }
    
    
    return 0;

}
    

1. 找到文件路径中文件名的位置：

#include <
    iostream>
    
#include <
    cstring>


int main() {
    
    const char* filePath = "C:\\Users\\user\\Documents\\file.txt";
    
    const char* fileName = strrchr(filePath, '\\');

    
    if (fileName != NULL) {
    
        std::cout <
    <
     "File name is: " <
    <
     fileName + 1 <
    <
     std::endl;
 // +1 to exclude the backslash
    }
 else {
    
        std::cout <
    <
     "File name not found in the path." <
    <
     std::endl;

    }
    
    
    return 0;

}
    

这些示例展示了如何在C++中使用strrchr函数来查找字符串中最后一个特定字符的位置。

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