- C++ Programming Examples
- C++ Programming Examples
- C++ Hello World
- C++ Get Input
- C++ Print Integer
- C++ Add Two Numbers
- C++ Add Sub Mul Div
- C++ Add Digits
- C++ Find Average Perc
- C++ Find Arithmetic Mean
- C++ Sum of n Natural Numbers
- C++ Sum of n Numbers
- C++ Area Perimeter of Square
- C++ Area Perimeter of Rectangle
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- C++ Area Circum of Circle
- C++ Find Simple Interest
- C++ Fahrenheit to Celsius
- C++ Celsius to Fahrenheit
- C++ Print Prime Numbers
- C++ Reverse a Number
- C++ Swap Two Numbers
- C++ Print Multiplication Table
- C++ Find Factorial of Number
- C++ Find Factors of Number
- C++ Find HCF & LCM
- C++ Make Calculator
- C++ Count Digits in Number
- C++ Sum of First & Last Digit
- C++ Product of Digits of Number
- C++ Sum of Squares of Digits
- C++ Interchange Digits of Number
- C++ if else Programs
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- C++ Check Prime or Not
- C++ Check Alphabet or Not
- C++ Check Vowel or Not
- C++ Check Leap Year or Not
- Check Reverse equal Original
- C++ Check Perfect Number
- C++ Check Palindrome or Not
- C++ Check Armstrong or Not
- C++ Divisibility Test
- C++ Find Wage of Labor
- C++ Find Discounted Price
- C++ Find Shipping Charge
- C++ Find Telephone Bills
- C++ Calculate Student Grade
- C++ Largest of Two Numbers
- C++ Largest of Three Numbers
- C++ Number Conversion
- C++ Decimal to Binary
- C++ Decimal to Octal
- C++ Decimal to Hexadecimal
- C++ Binary to Decimal
- C++ Binary to Octal
- C++ Binary to Hexadecimal
- C++ Octal to Decimal
- C++ Octal to Binary
- C++ Octal to Hexadecimal
- C++ Hexadecimal to Decimal
- C++ Hexadecimal to Binary
- C++ Hexadecimal to Octal
- C++ Pattern Programs
- C++ Pattern Programs
- C++ Print Diamond Pattern
- C++ Print Floyd's Triangle
- C++ Print Pascal's Triangle
- C++ Array Programs
- C++ 1D Array Program
- C++ Linear Search
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- Find Largest Element in Array
- Find Smallest Element in Array
- Find Second Largest Element
- Find Second Smallest Element
- C++ Sum of All Elements
- C++ Multiply All Elements
- C++ Element on Even Position
- C++ Element on Odd Position
- C++ Print Even Numbers in Array
- C++ Print Odd Numbers in Array
- C++ Count Even/Odd Numbers
- C++ Sum of Even/Odd Numbers
- C++ Count Positive Negative Zero
- C++ Reverse an Array
- C++ Insert Element in Array
- C++ Delete Element from Array
- C++ Merge two Arrays
- C++ Bubble Sort
- C++ Selection Sort
- C++ Insertion Sort
- C++ Common Elements
- C++ 2D Array Programs
- C++ Add Two Matrices
- C++ Subtract Two Matrices
- C++ Transpose Matrix
- C++ Multiply Two Matrices
- C++ 3D Array Programs
- C++ String Programs
- C++ Print String
- C++ Find Length of String
- C++ Compare Two Strings
- C++ Copy String
- C++ Concatenate String
- C++ Reverse a String
- C++ Delete Vowels from String
- C++ Delete Word from String
- C++ Count Character in String
- C++ Count Word in String
- C++ Frequency of Word
- C++ Remove Spaces from String
- C++ Sort a String
- C++ Uppercase to Lowercase
- C++ Lowercase to Uppercase
- C++ Swap Two Strings
- C++ Check Anagram or Not
- C++ Capitalize All Words in String
- C++ Capitalize Specific Character
- C++ Get Numbers from String
- C++ File Programs
- C++ Read a File
- C++ Write Content to File
- C++ Append Data in File
- C++ Read & Display File
- C++ Copy a File
- C++ Merge Two Files
- Count Characters, Words in File
- C++ Capitalize All Words in File
- C++ List Files in Directory
- C++ Delete a File
- C++ Encrypt & Decrypt a File
- C++ Misc Programs
- C++ Print ASCII Value
- C++ Add Binary Numbers
- C++ Generate Random Numbers
- C++ Print Smiling Face
- C++ Days into Years, Months
- Add Two Numbers using Pointer
- C++ Print Fibonacci Series
- Generate Armstrong Numbers
- C++ Find nCr and nPr
- C++ Get IP Address
- C++ Print Date/Time
- C++ Shutdown, Restart Computer
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C++ Program to Swap Two Strings
In this article, you will learn and get code to swap two strings entered by user using a C++ program. Here are the list of programs on swapping of two given strings:
- Swap Two Strings using Library Function
- Swap Two Strings without using Library Function
Swap Two Strings using Library Function
To swap two strings in C++ programming, you have to ask from user to enter the two strings. The value of both strings gets stored in two variables say strOne (first string) and strTwo (second string). Now swap these two strings using a third variable say strTmp with the help of library function, strcpy() as shown in the program given below:
#include<iostream> #include<stdio.h> #include<string.h> using namespace std; int main() { char strOne[50], strTwo[50], strTmp[50]; cout<<"Enter the First String: "; gets(strOne); cout<<"Enter the Second String: "; gets(strTwo); cout<<"\nString before Swap:\n"; cout<<"First String = "<<strOne<<"\tSecond String = "<<strTwo; strcpy(strTmp, strOne); strcpy(strOne, strTwo); strcpy(strTwo, strTmp); cout<<"\n\nString after Swap:\n"; cout<<"First String = "<<strOne<<"\tSecond String = "<<strTwo; cout<<endl; return 0; }
This program was build and run under Code::Blocks IDE. Here is its sample run:
Now supply two strings say codes as first and cracker as second string. Here is the sample run with these two strings as input:
The following block of code:
strcpy(strTmp, strOne); strcpy(strOne, strTwo); strcpy(strTwo, strTmp);
is responsible for swapping of two strings. For example, if user enters the same two strings as given in above program's sample run. Initially strOne=codes and strTwo=cracker. Now after executing the first statement (of above three lines of statement):
strcpy(strTmp, strOne);
the value of strOne gets copied to strTmp. So strTmp=codes. In similar way, after executing the following (second) statement:
strcpy(strOne, strTwo);
the value of strTwo gets copied to strOne. So strOne=cracker. And using the third statement, that is:
strcpy(strTwo, strTmp);
the value of strTmp gets copied to strTwo. So strTwo=codes. In this way swapping gets perfomed using strcpy() library function of C++.
Swap Two Strings without using Library Function
This program just copies the string manually (using user-based code), without using library function strcpy():
#include<iostream> #include<stdio.h> using namespace std; int main() { char strOne[50], strTwo[50], strTmp[50]; int i=0; cout<<"Enter the First String: "; gets(strOne); cout<<"Enter the Second String: "; gets(strTwo); cout<<"\nString before Swap:\n"; cout<<"First String = "<<strOne<<"\tSecond String = "<<strTwo; while(strOne[i]!='\0') { strTmp[i] = strOne[i]; i++; } strTmp[i] = '\0'; i=0; while(strTwo[i]!='\0') { strOne[i] = strTwo[i]; i++; } strOne[i] = '\0'; i=0; while(strTmp[i]!='\0') { strTwo[i] = strTmp[i]; i++; } strTwo[i] = '\0'; cout<<"\n\nString after Swap:\n"; cout<<"First String = "<<strOne<<"\tSecond String = "<<strTwo; cout<<endl; return 0; }
This program produces the same output as of previous program. In above program, instead of using strcpy() function to copy string, we've done the same thing using user-based code.
Note - To learn more about copy one string to other, refer to copy string program to get every required thing about the topic. There you will get the full detail about how the code given in previous program works.
Same Program in Other Languages
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