浅谈sizeof和strlen

sizeof是指针指向的字符串所占的大小，包含一个“\0”，这个是字符串结尾符
strlen是指针指向的字符串大大小，不包含字符结尾符号“\0”
代码说明：

#include <cstddef>#include <cstring>#include <iostream>using namespace std;int main(){    char text1[] = "abcdef";    size_t s1 = sizeof(text1);  // is 7    size_t s2 = strlen(text1);  // is 6    cout << s1 << endl << s2 << endl;    const char* text2 = "abcdef";    size_t s3 = sizeof(text2);  // is platform-dependent (e.g. 4 bytes for x86, 8 bytes for x64)    size_t s4 = strlen(text2);  // is 6    cout << s3 << endl << s4 << endl;    system("pause");    return 0;}