{"id":91527,"date":"2022-10-11T22:52:35","date_gmt":"2022-10-12T03:52:35","guid":{"rendered":"https:\/\/blogging-techies.com\/sw\/hur-man-vander-en-strang-i-c-python-och-javascript\/"},"modified":"2022-10-11T22:52:35","modified_gmt":"2022-10-12T03:52:35","slug":"hur-man-vander-en-strang-i-c-python-och-javascript","status":"publish","type":"post","link":"https:\/\/blogging-techies.com\/sw\/hur-man-vander-en-strang-i-c-python-och-javascript\/","title":{"rendered":"Hur man v\u00e4nder en str\u00e4ng i C++, Python och JavaScript"},"content":{"rendered":"
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Som programmerare har du troligen st\u00e4llts inf\u00f6r en situation som kr\u00e4ver att du v\u00e4nder p\u00e5 en str\u00e4ng. Att v\u00e4nda en str\u00e4ng \u00e4r en av de vanligaste situationerna som programmerare m\u00f6ter n\u00e4r de l\u00e4r sig koda. Du kan v\u00e4nda en str\u00e4ng genom att anv\u00e4nda inbyggda funktioner eller genom att skriva din egen implementering av den omv\u00e4nda funktionen.<\/p>\n

I den h\u00e4r artikeln kommer du att l\u00e4ra dig om olika metoder f\u00f6r att v\u00e4nda en str\u00e4ng i C++, Python och JavaScript.<\/p>\n

<\/span> Olika metoder f\u00f6r att v\u00e4nda en str\u00e4ng i C++<\/span><\/h2>\n

Du kan v\u00e4nda en str\u00e4ng i C++ med dessa metoder:<\/p>\n

<\/span>V\u00e4nd en str\u00e4ng i C++ med den inbyggda reverse()-funktionen<\/span><\/h3>\n

Nedan \u00e4r programmet C++ f\u00f6r att v\u00e4nda en str\u00e4ng med den inbyggda omv\u00e4nd()<\/strong> fungera:<\/p>\n

\/\/ C++ implementation to reverse a string\/\/ using inbuilt function: reverse()#include <bits\/stdc++.h>using namespace std;\/\/ Driver Codeint main(){string str1 = \"MUO\";string str2 = \"Welcome to MUO\";string str3 = \"She sells seashells by the seashore\";cout << \"Input string:\" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;reverse(str1.begin(), str1.end());reverse(str2.begin(), str2.end());reverse(str3.begin(), str3.end());cout << \"Reversed string: \" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;return 0;}<\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i C++ genom att byta tecken<\/span><\/h3>\n
Nedan \u00e4r programmet C++ f\u00f6r att v\u00e4nda en str\u00e4ng genom att byta tecken:<\/p>\n
\/\/ C++ implementation to reverse a string\/\/ by swapping characters#include <bits\/stdc++.h>using namespace std;\/\/ Own implementation of a function to reverse a stringvoid reverseString(string& str){int size = str.size();for(int i=0, j=size-1; i<size\/2; i++, j--){swap(str[i], str[j]);}}\/\/ Driver Codeint main(){string str1 = \"MUO\";string str2 = \"Welcome to MUO\";string str3 = \"She sells seashells by the seashore\";cout << \"Input string:\" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;reverseString(str1);reverseString(str2);reverseString(str3);cout << \"Reversed string: \" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;return 0;}<\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i C++ med omv\u00e4nda iteratorer med en konstrukt\u00f6r<\/span><\/h3>\n
Nedan \u00e4r C++-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med omv\u00e4nda iteratorer med en konstruktor:<\/p>\n
\/\/ C++ implementation to reverse a string\/\/ using constructor#include <bits\/stdc++.h>using namespace std;int main(){string str1 = \"MUO\";string str2 = \"Welcome to MUO\";string str3 = \"She sells seashells by the seashore\";
cout << \"Input string:\" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;\/\/ Using reverse iterators to reverse a stringstring reversedStr1 = string(str1.rbegin(), str1.rend());string reversedStr2 = string(str2.rbegin(), str2.rend());string reversedStr3 = string(str3.rbegin(), str3.rend());cout << \"Reversed string: \" << endl;cout << reversedStr1 << endl;cout << reversedStr2 << endl;cout << reversedStr3 << endl;return 0;}<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i C++ med en tillf\u00e4llig str\u00e4ng<\/span><\/h3>\n
Nedan \u00e4r C++-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med en tillf\u00e4llig str\u00e4ng:<\/p>\n
\/\/ C++ implementation to reverse a string\/\/ using a temporary string#include <bits\/stdc++.h>using namespace std;\/\/ Function to reverse a string using a temporary stringstring reverseString(string str){int size = str.size();string tempStr;for(int i=size-1; i>=0; i--){tempStr.push_back(str[i]);}return tempStr;}\/\/ Driver Codeint main(){string str1 = \"MUO\";string str2 = \"Welcome to MUO\";string str3 = \"She sells seashells by the seashore\";cout << \"Input string:\" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;str1 = reverseString(str1);str2 = reverseString(str2);str3 = reverseString(str3);cout << \"Reversed string: \" << endl;cout << str1 << endl;cout << str2 << endl;cout << str3 << endl;
return 0;}<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>  Olika metoder f\u00f6r att v\u00e4nda en str\u00e4ng i Python<\/span><\/h2>\n
Du kan v\u00e4nda en str\u00e4ng i Python med dessa metoder:<\/p>\n
<\/span>V\u00e4nd en str\u00e4ng i Python med ut\u00f6kad segmentsyntax<\/span><\/h3>\n
Nedan finns Python-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med en ut\u00f6kad segmentsyntax:<\/p>\n
# Python implementation to reverse a string# using extended slice syntaxdef reverseString(str):return str[::-1]
str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";print(\"Input string:\")print(str1)print(str2)print(str3)str1 = reverseString(str1)str2 = reverseString(str2)str3 = reverseString(str3)print(\"Reversed string:\")print(str1)print(str2)print(str3)<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i Python med hj\u00e4lp av rekursion<\/span><\/h3>\n
Nedan finns Python-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med hj\u00e4lp av rekursion:<\/p>\n
# Python implementation to reverse a string# using recursiondef reverseString(str):if len(str) == 0:return strelse:return reverseString(str[1:]) + str[0]
str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";print(\"Input string:\")print(str1)print(str2)print(str3)str1 = reverseString(str1)str2 = reverseString(str2)str3 = reverseString(str3)print(\"Reversed string:\")print(str1)print(str2)print(str3)<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i Python med den inbyggda reversed()-metoden<\/span><\/h3>\n
Nedan finns Python-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med den inbyggda reversed()<\/strong> metod:<\/p>\n
# Python implementation to reverse a string# using reversed method()def reverseString(str):str = \"\".join(reversed(str))return str
str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";print(\"Input string:\")print(str1)print(str2)print(str3)str1 = reverseString(str1)str2 = reverseString(str2)str3 = reverseString(str3)print(\"Reversed string:\")print(str1)print(str2)print(str3)<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i Python med en tillf\u00e4llig str\u00e4ng<\/span><\/h3>\n
Nedan finns Python-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med en tillf\u00e4llig str\u00e4ng:<\/p>\n
# Python implementation to reverse a string# using a temporary stringdef reverseString(str):tempStr = \"\"for s in str:tempStr = s + tempStrreturn tempStr
str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";print(\"Input string:\")print(str1)print(str2)print(str3)str1 = reverseString(str1)str2 = reverseString(str2)str3 = reverseString(str3)print(\"Reversed string:\")print(str1)print(str2)print(str3)<\/p><\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>  Olika metoder f\u00f6r att v\u00e4nda en str\u00e4ng i JavaScript<\/span><\/h2>\n
Du kan v\u00e4nda en str\u00e4ng i JavaScript med dessa metoder:<\/p>\n
<\/span>V\u00e4nd en str\u00e4ng i JavaScript med hj\u00e4lp av rekursion<\/span><\/h3>\n
Nedan finns JavaScript-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med hj\u00e4lp av rekursion:<\/p>\n
\/\/ JavScript implementation to reverse a string\/\/ using recursionfunction reverseString(str) {if (str === \"\") {return \"\";} else {return reverseString(str.substr(1)) + str.charAt(0);}}str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";document.write(\"Input string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");str1 = reverseString(str1);str2 = reverseString(str2);str3 = reverseString(str3);document.write(\"Reversed string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");<\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i JavaScript med inbyggda metoder<\/span><\/h3>\n
Nedan finns JavaScript-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med inbyggda metoder:<\/p>\n
\/\/ JavaScript implementation to reverse a string\/\/ using inbuilt methodsfunction reverseString(str) {return str.split(\"\").reverse().join(\"\");}str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";document.write(\"Input string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");str1 = reverseString(str1);str2 = reverseString(str2);str3 = reverseString(str3);document.write(\"Reversed string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");<\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>V\u00e4nd en str\u00e4ng i JavaScript med hj\u00e4lp av en tillf\u00e4llig str\u00e4ng<\/span><\/h3>\n
Nedan finns JavaScript-programmet f\u00f6r att v\u00e4nda en str\u00e4ng med en tillf\u00e4llig str\u00e4ng:<\/p>\n
\/\/ JavScript implementation to reverse a string\/\/ using a temporary stringfunction reverseString(str) {var size = str.length;tempStr = \"\";for(let i=size-1; i>=0; i--){tempStr += str[i];}return tempStr;}str1 = \"MUO\";str2 = \"Welcome to MUO\";str3 = \"She sells seashells by the seashore\";document.write(\"Input string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");str1 = reverseString(str1);str2 = reverseString(str2);str3 = reverseString(str3);document.write(\"Reversed string: <br>\");document.write(str1 + \"<br>\");document.write(str2 + \"<br>\");document.write(str3 + \"<br>\");<\/pre>\n
Produktion:<\/p>\n
Input string:MUOWelcome to MUOShe sells seashells by the seashoreReversed string: OUMOUM ot emocleWerohsaes eht yb sllehsaes slles ehS<\/pre>\n
<\/span>  L\u00e4r dig str\u00e4ngmanipulation<\/span><\/h2>\n
F\u00f6r att l\u00f6sa str\u00e4ngrelaterade intervjuproblem m\u00e5ste du veta hur man manipulerar en str\u00e4ng.  Du kan manipulera en str\u00e4ng i vilket programmeringsspr\u00e5k som helst som C++, Python, JavaScript, Java, C, etc.<\/p>\n
Python tillhandah\u00e5ller den mest l\u00e4ttf\u00f6rst\u00e5eliga syntaxen f\u00f6r att manipulera en str\u00e4ng.  Om det verkar sv\u00e5rt f\u00f6r dig att manipulera str\u00e4ngar, ge Python en chans;  det \u00e4r bedr\u00e4gligt okomplicerat.<\/p>\n
    Om f\u00f6rfattaren<\/strong><\/p>\n
            Yuvraj Chandra (80 artiklar publicerade)
<\/strong><\/p>\n
Yuvraj \u00e4r en datavetenskapsstudent vid University of Delhi, Indien.  Han brinner f\u00f6r Full Stack Web Development.  N\u00e4r han inte skriver unders\u00f6ker han djupet i olika teknologier.<\/p>\n
                            Mer fr\u00e5n Yuvraj Chandra<\/p>\n
<\/span>Prenumerera p\u00e5 v\u00e5rt nyhetsbrev<\/span><\/h4>\n
G\u00e5 med i v\u00e5rt nyhetsbrev f\u00f6r tekniska tips, recensioner, free e-b\u00f6cker och exklusiva erbjudanden!<\/p>\n
Klicka h\u00e4r f\u00f6r att prenumerera<\/p>\n<\/p><\/div>\n  
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