C program to swap two words in a string

C program to swap two words in a string

Output:

Enter a string with two words:
swap this
Final string is:
     this swap

Implementation:

#include <stdio.h> #include <string.h> #define MAX 1000000 int main(void) { char s[MAX],t[MAX]; int len,i,k; printf("Enter a string with two words:\n"); gets(s); len=strlen(s); for(i=0;s[i]!=' ';i++) { t[i]=s[i]; } t[i]='\0'; k=i+1; for(i=0;k<len;k++,i++) { s[i]=s[k]; } s[i++]=' '; for(k=0;t[k]!='\0';k++,i++) { s[i]=t[k]; } s[i]='\0'; printf("Final string is:\n\t%s",s); return 0; }