C program for swapping of two strings

• C program for swapping of two strings.
• C program to swap two strings without using library functions.
• Now we will swap two strings without using library functions and by using arrays in java.
• Now we will write a C program on how to swap two strings.

Program #1 Write a C program to swap two strings

1. #include <stdio.h>
2. #include <stdlib.h>
3. int main(int argc, char *argv[])
4. {
5.  int i=0,j=0,k=0;
6.   char str1[20],str2[20],temp[20];
7.   puts("Enter first string");
8.   gets(str1);
9.   puts("Enter second string");
10.   gets(str2);
11.   printf("Before swapping the strings \n");
12.   puts(str1);
13.   puts(str2);
14.   while(str1[i]!='\0'){
15.              temp[j++]=str1[i++];
16.   }
17.   temp[j]='\0';
18.   i=0,j=0;
19.   while(str2[i]!='\0'){
20.               str1[j++]=str2[i++];
21.   }
22.   str1[j]='\0';
23.   i=0,j=0;
24.   while(temp[i]!='\0'){
25.               str2[j++]=temp[i++];
26.   }
27.   str2[j]='\0';
28.   printf("After swapping the strings are\n");
29.   puts(str1);
30.   puts(str2);
31.   getch();
32. }

  
Output: