Swap Two Numbers Using Call by Reference
Write a C Program to Swap Two Numbers Using Call by Reference. Here’s simple Program to Swap Two Numbers Using Call by Reference in C Programming Language.
What are Pointers?
A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address.
The general form of a pointer variable declaration is −
- type *var-name;
Here, type is the pointer’s base type; it must be a valid C data type and var-name is the name of the pointer variable.
The asterisk * used to declare a pointer is the same asterisk used for multiplication. However, in this statement the asterisk is being used to designate a variable as a pointer.
The unary or monadic operator & gives the “address of a variable’”.
The indirection or dereference operator * gives the “contents of an object pointed to by a pointer”.
Below is the source code for C Program to Swap Two Numbers Using Call by Reference which is successfully compiled and run on Windows System to produce desired output as shown below :
SOURCE CODE : :
/* C Program to Swap Two Numbers Using Call by Reference */ #include<stdio.h> void cyclicSwap(int *a,int *b,int *c); int main() { int a, b, c; printf("Enter a :: "); scanf("%d",&a); printf("\nEnter b :: "); scanf("%d",&b); printf("\nEnter c :: "); scanf("%d",&c); printf("\nValues Before swapping :: \n"); printf("\ta = %d\tb = %d\tc = %d\n",a,b,c); cyclicSwap(&a, &b, &c); printf("\nValues After swapping :: \n"); printf("\ta = %d\tb = %d\tc = %d\n",a,b,c); return 0; } void cyclicSwap(int *a,int *b,int *c) { int temp; // swapping in cyclic order temp = *b; *b = *a; *a = *c; *c = temp; }
Output : :
/* C Program to Swap Two Numbers Using Call by Reference */ Enter a :: 7 Enter b :: 8 Enter c :: 9 Values Before swapping :: a = 7 b = 8 c = 9 Values After swapping :: a = 9 b = 7 c = 8 Process returned 0
Above is the source code for C Program to Swap Two Numbers Using Call by Reference which is successfully compiled and run on Windows System.The Output of the program is shown above .
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