3 Swapping

//SWAP TWO VARIABLES WITHOUT USING THIRD USING C PROGRAM VARIABLE

#include<stdio.h>

int main(){

    int a=5,b=10;

    //process one
    a=b+a;
    b=a-b;
    a=a-b;
    printf("a= %d  b=  %d",a,b);

    //process two
    a=5;b=10;
    a=a+b-(b=a);
    printf("\na= %d  b=  %d",a,b);

    //process three
    a=5;b=10;
    a=a^b;
    b=a^b;
    a=b^a;
    printf("\na= %d  b=  %d",a,b);

    //process four
    a=5;b=10;
    a=b-~a-1;
    b=a+~b+1;
    a=a+~b+1;
    printf("\na= %d  b=  %d",a,b);

    //process five
    a=5,b=10;
    a=b+a,b=a-b,a=a-b;
    printf("\na= %d  b=  %d",a,b);

    return 0;
}

/Write a c program for swapping of two arrays

#include<stdio.h>
int main(){
  int a[10],b[10],c[10],i;
  printf("Enter First array->");
  for(i=0;i<10;i++)
  scanf("%d",&a[i]);
  printf("\nEnter Second array->");
  for(i=0;i<10;i++)
            scanf("%d",&b[i]);
  printf("Arrays before swapping");
  printf("\nFirst array->");
  for(i=0;i<10;i++){
            printf("%d",a[i]);
  }
  printf("\nSecond array->");
  for(i=0;i<10;i++){
            printf("%d",b[i]);
  }
  for(i=0;i<10;i++){
            //write any swapping technique
            c[i]=a[i];
            a[i]=b[i];
            b[i]=c[i];
  }
  printf("\nArrays after swapping");
  printf("\nFirst array->");
  for(i=0;i<10;i++){
            printf("%d",a[i]);
  }
  printf("\nSecond array->");
  for(i=0;i<10;i++){
            printf("%d",b[i]);
  }
  return 0;
}

//SWAPPING OF STRINGS USING C PROGRAM

#include<stdio.h>
int main(){
  int i=0,j=0,k=0;
  char str1[20],str2[20],temp[20];
  puts("Enter first string");
  gets(str1);
  puts("Enter second string");
  gets(str2);
  printf("Before swaping the strings are\n");
  puts(str1);
  puts(str2);
  while(str1[i]!='\0'){
             temp[j++]=str1[i++];
  }
  temp[j]='\0';
  i=0,j=0;
  while(str2[i]!='\0'){
              str1[j++]=str2[i++];
  }
  str1[j]='\0';
  i=0,j=0;
  while(temp[i]!='\0'){
              str2[j++]=temp[i++];
  }
  str2[j]='\0';
  printf("After swaping the strings are\n");
  puts(str1);
  puts(str2);
  return 0;
}