swap two numbers in c
#include <stdio.h>
int main() {
double a, b;
printf("Enter a: ");
scanf("%lf", &a);
printf("Enter b: ");
scanf("%lf", &b);
// Swapping
// a = (initial_a - initial_b)
a = a - b;
// b = (initial_a - initial_b) + initial_b = initial_a
b = a + b;
// a = initial_a - (initial_a - initial_b) = initial_b
a = b - a;
printf("After swapping, a = %.2lf\n", a);
printf("After swapping, b = %.2lf", b);
return 0;
}c program to swap two numbers using call by reference
#include <stdio.h>
void swap(int*, int*);
int main()
{
int x, y;
printf("Enter the value of x and y\n");
scanf("%d%d",&x,&y);
printf("Before Swapping\nx = %d\ny = %d\n", x, y);
swap(&x, &y);
printf("After Swapping\nx = %d\ny = %d\n", x, y);
return 0;
}
void swap(int *a, int *b)
{
int temp;
temp = *b;
*b = *a;
*a = temp;
}c program for swapping of two numbers using temporary variable
#include <stdio.h>
int main()
{
int a, b, temp;
printf("enter the values of a and b: \n");
scanf("%d%d", &a, &b );
printf("current values are:\n a=%d\n b=%d\n", a, b);
temp=a;
a=b;
b=temp;
printf("After swapping:\n a=%d\n b=%d\n", a, b);
}c function to swap two numbers
#include<stdio.h>
void swap(int *,int *);
int main()
{
int n1,n2;
printf("\n\n Function : swap two numbers using function :\n");
printf("------------------------------------------------\n");
printf("Input 1st number : ");
scanf("%d",&n1);
printf("Input 2nd number : ");
scanf("%d",&n2);
printf("Before swapping: n1 = %d, n2 = %d ",n1,n2);
//pass the address of both variables to the function.
swap(&n1,&n2);
printf("\nAfter swapping: n1 = %d, n2 = %d \n\n",n1,n2);
return 0;
}
void swap(int *p,int *q)
{
//p=&n1 so p store the address of n1, so *p store the value of n1
//q=&n2 so q store the address of n2, so *q store the value of n2
int tmp;
tmp = *p; // tmp store the value of n1
*p=*q; // *p store the value of *q that is value of n2
*q=tmp; // *q store the value of tmp that is the value of n1
}how to swap values in variables in c
#include <stdio.h>
#include <stdlib.h>
int main()
{
//initialize variables
int num1 = 10;
int num2 = 9;
int tmp;
//create the variables needed to store the address of the variables
//that we want to swap values
int *p_num1 = &num1;
int *p_num2 = &num2;
//print what the values are before the swap
printf("num1: %i\n", num1);
printf("num2: %i\n", num2);
//store one of the variables in tmp so we can access it later
//gives the value we stored in another variable the new value
//give the other variable the value of tmp
tmp = num1;
*p_num1 = num2;
*p_num2 = tmp;
//print the values after swap has occured
printf("num1: %i\n", num1);
printf("num2: %i\n", num2);
return 0;
}Copyright © 2021 Codeinu
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