使用姓氏打印姓名首字母的程序

给定一个字符串形式的全名，任务是打印一个名字的首字母，简而言之，完整的姓氏。

例子：

Input: Devashish Kumar Gupta
Output: D. K. Gupta

Input: Ishita Bhuiya
Output: I. Bhuiya

方法：基本方法是一个一个地提取单词，然后打印单词的第一个字母，后跟一个点（.）。对于姓氏，提取并打印整个单词。

下面是上述方法的实现：

C++

// C++ program to print the initials
// of a name with the surname
#include 
using namespace std;
  
void printInitials(string str) 
{
    int len = str.length();
  
    // to remove any leading or trailing spaces
    str.erase(0, str.find_first_not_of(' '));
    str.erase(str.find_last_not_of(' ') + 1);
  
    // to store extracted words
    string t = "";
    for (int i = 0; i < len; i++) 
    {
        char ch = str[i];
  
        if (ch != ' ')
  
            // forming the word
            t = t + ch;
  
        // when space is encountered
        // it means the name is completed
        // and thereby extracted
        else
        {
            // printing the first letter
            // of the name in capital letters
            cout << (char)toupper(t[0]) << ". ";
            t = "";
        }
    }
  
    string temp = "";
  
    // for the surname, we have to print the entire
    // surname and not just the initial
    // string "t" has the surname now
    for (int j = 0; j < t.length(); j++) 
    {
        // first letter of surname in capital letter
        if (j == 0) temp = temp + (char)toupper(t[0]);
  
        // rest of the letters in small
        else
            temp = temp + (char)tolower(t[j]);
    }
  
    // printing surname
    cout << temp << endl;
}
  
// Driver Code
int main() 
{
    string str = "ishita bhuiya";
    printInitials(str);
}
  
// This code is contributed by
// sanjeev2552

Java

// Java program to print the initials
// of a name with the surname
import java.util.*;
  
class Initials {
    public static void printInitials(String str)
    {
        int len = str.length();
  
        // to remove any leading or trailing spaces
        str = str.trim();
  
        // to store extracted words
        String t = "";
        for (int i = 0; i < len; i++) {
            char ch = str.charAt(i);
  
            if (ch != ' ') {
  
                // forming the word
                t = t + ch;
            }
  
            // when space is encountered
            // it means the name is completed
            // and thereby extracted
            else {
                // printing the first letter
                // of the name in capital letters
                System.out.print(Character.toUpperCase(t.charAt(0))
                                 + ". ");
                t = "";
            }
        }
  
        String temp = "";
  
        // for the surname, we have to print the entire
        // surname and not just the initial
        // string "t" has the surname now
        for (int j = 0; j < t.length(); j++) {
  
            // first letter of surname in capital letter
            if (j == 0)
                temp = temp + Character.toUpperCase(t.charAt(0));
  
            // rest of the letters in small
            else
                temp = temp + Character.toLowerCase(t.charAt(j));
        }
  
        // printing surname
        System.out.println(temp);
    }
  
    public static void main(String[] args)
    {
        String str = "ishita bhuiya";
        printInitials(str);
    }
}

Python3

# Python program to print the initials
# of a name with the surname
def printInitials(string: str):
    length = len(string)
  
    # to remove any leading or trailing spaces
    string.strip()
  
    # to store extracted words
    t = ""
    for i in range(length):
        ch = string[i]
        if ch != ' ':
  
            # forming the word
            t += ch
  
        # when space is encountered
        # it means the name is completed
        # and thereby extracted
        else:
  
            # printing the first letter
            # of the name in capital letters
            print(t[0].upper() + ". ", end="")
            t = ""
  
    temp = ""
  
    # for the surname, we have to print the entire
    # surname and not just the initial
    # string "t" has the surname now
    for j in range(len(t)):
  
        # first letter of surname in capital letter
        if j == 0:
            temp += t[0].upper()
  
        # rest of the letters in small
        else:
            temp += t[j].lower()
  
    # printing surname
    print(temp)
  
# Driver Code
if __name__ == "__main__":
  
    string = "ishita bhuiya"
    printInitials(string)
  
# This code is contributed by
# sanjeev2552

C#

// C# program to print the initials 
// of a name with the surname 
using System;
  
class Initials { 
      
    public static void printInitials(string str) 
    { 
        int len = str.Length ;
  
        // to remove any leading or trailing spaces 
        str = str.Trim(); 
  
        // to store extracted words 
        String t = ""; 
        for (int i = 0; i < len; i++) { 
            char ch = str[i]; 
  
            if (ch != ' ') { 
  
                // forming the word 
                t = t + ch; 
            } 
  
            // when space is encountered 
            // it means the name is completed 
            // and thereby extracted 
            else { 
                // printing the first letter 
                // of the name in capital letters 
                Console.Write(Char.ToUpper(t[0]) 
                                + ". "); 
                t = ""; 
            } 
        } 
  
        string temp = ""; 
  
        // for the surname, we have to print the entire 
        // surname and not just the initial 
        // string "t" has the surname now 
        for (int j = 0; j < t.Length; j++) { 
  
            // first letter of surname in capital letter 
            if (j == 0) 
                temp = temp + Char.ToUpper(t[0]); 
  
            // rest of the letters in small 
            else
                temp = temp + Char.ToLower(t[j]); 
        } 
  
        // printing surname 
        Console.WriteLine(temp); 
    } 
  
    public static void Main() 
    { 
        string str = "ishita bhuiya"; 
        printInitials(str); 
    } 
    // This code is contributed by Ryuga
}

输出：

I. Bhuiya