strtype3.cpp

来自「《C++.Primer.Plus.第五版.中文版》的源代码」· C++ 代码 · 共 32 行

// strtype3.cpp -- more string class features
#include <iostream>
#include <string>               // make string class available
#include <cstring>              // C-style string library
int main()
{
    using namespace std;
    char charr1[20]; 
    char charr2[20] = "jaguar"; 
    string str1;  
    string str2 = "panther";

    // assignment for string objects and character arrays
    str1 = str2;                // copy str2 to str2
    strcpy(charr1, charr2);     // copy charr2 to charr1
 
    // appending for string objects and character arrays
    str1 += " paste";           // add paste to end of str1
    strcat(charr1, " juice");   // add juice to end of charr1

    // finding the length of a string object and a C-style string
    int len1 = str1.size();     // obtain length of str1
    int len2 = strlen(charr1);  // obtain length of charr1
 
    cout << "The string " << str1 << " contains "
         << len1 << " characters.\n";
    cout << "The string " << charr1 << " contains "
         << len2 << " characters.\n";

    return 0; 
}