C/C++实现删除字符串的首尾空格

StdStringTrimTest.cpp

#include <iostream>
int main()
{std::string str("   字符串   String    ");std::cout << str << std::endl;std::cout << str.size() << std::endl;str.erase(str.find_first_of(' '), str.find_first_not_of(' '));str.erase(str.find_last_not_of(' ') + 1);std::cout << str << std::endl;std::cout << str.size() << std::endl;return 0;
}

CStyleStringTrimTest.c

#include <stdio.h>
#include <string.h>
#define STRING_LENGTH 10000
int main()
{const char *text = "   字符串   String    ";printf("%s\n%u\n", text, strlen(text));while (*text == ' ')++text;char str[STRING_LENGTH];strcpy(str, text);size_t i = strlen(str) - 1;while (str[i] == ' ')str[i--] = '\0';printf("%s\n%u\n", str, strlen(str));return 0;
}

Compilation.bat

g++ -std=c++11 StdStringTrimTest.cpp -o StdStringTrimTest
gcc -std=c11 CStyleStringTrimTest.c -o CStyleStringTrimTest