C Programming language

/** Example of Switch Case in C **/
#include<stdio.h>
#include <conio.h>
main()
{
	int menu, num1, num2, total;
	clrscr();
	printf ("enter any two numbers ");
	scanf ("%d %d", &num1, &num2 );
	printf ("enter your choice\n");
	printf("1=addition\n");
	printf("2=subtraction\n");
	printf("3=multiplication\n");
	scanf ("%d", &menu );
	switch( menu ) 
	{
		case 1: total = num1 + num2; break;
		case 2: total = num1 - num2; break;
		case 3: total = num1* num; break;
		default: printf ("Invalid option selected\n");
	}
	if( menu == 1 )
		printf ("%d plus %d is %d\n", numb1, numb2, total );
	else if( menu == 2 )
		printf ("%d minus %d is %d\n", num1, num2, total );
	else (menu==3)
		printf ("%d cross %d is %d\n", num1, num2, total );
}

enter any two number

45 40

1=addition

2=subtraction

3=multiplication

enter your choice

2

minus is 5