Reading and guessing a number using the 'start' and 'goto' C keyword

 

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional library: none/default

Additional project setting: Set project to be compiled as C

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C Code (/TC)

Other info: none

To do: Reading and guessing a number using the 'start' and 'goto' C keyword

To show: How to use the 'goto' and 'start' C keyword in guessing a number input by user

 

 

// Demonstrates the 'goto' usage

#include <stdio.h>

 

void main(void)

{

int n;

 

start: ;

puts("Enter a number between 0 and 10: ");

puts("(Try 0, 1, > 10 and between 0 and 10)");

 

/* scanf("%d", &n); */

scanf_s("%d", &n, 1);

if ((n < 0) || (n > 10))

goto start;

else if (n == 0)

goto location0;

else if (n == 1)

goto location1;

else

goto location2;

location0: ;

{

puts("You entered 0.");

}

goto end;

location1: ;

{

puts("You entered 1.");

}

goto end;

location2: ;

{

puts("You entered something between 2 and 10.");

}

end: ;

}

 

Output example:

 

Enter a number between 0 and 10:

(Try 0, 1, > 10 and between 0 and 10)

11

Enter a number between 0 and 10:

(Try 0, 1, > 10 and between 0 and 10)

-3

Enter a number between 0 and 10:

(Try 0, 1, > 10 and between 0 and 10)

7

You entered something between 2 and 10.

Press any key to continue . . .

 

 

Enter a number between 0 and 10:

(Try 0, 1, > 10 and between 0 and 10)

1

You entered 1.

Press any key to continue . . .

 

 

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