Dice roller

[Kareta]

Just wondering if there's anyway to use characters instead of numbers, and what argument denotes a character variable? (Like %d denotes an integer) Or even an easier way to right the code below


Following code is in C:
/*
* 13-sided Die Roller.
*/

#include <stdio.h>

int main(void){

int x=0;
int y;
int z;

printf("Press 1 to run program\n");

printf("Press 2 to cancel.\n");

printf("Press 3 for more information.\n");
scanf("%d", &y);

switch(y){

case 1:
srand(time(NULL));
while(x<1){
printf("%d\n", 1+rand()%13);
x++;
}
break;
case 2:
printf("Program terminated.");
break;
case 3:
printf("This program will roll a 13 sided die once.\n\n");
switch(z){
default:
printf("Press 1 to run program:");
scanf("%d", &z);

srand(time(NULL));
while(x<1){
printf("%d\n", 1+rand()%13);
x++;
}
break;
}
break;
default:
printf("Please enter a correct argument.");
break;
}
return 0;
}Also, how would I be able to 'infinitively" loop the program? Like, as soon as it's finished, start from the beginning or have a line of text that says "Press 1 to reroll" and another that says "Press 2 to cancel", but loops infinitively.

Sorry if the question was confusing or stupid.


EDIT (see below): Changed the code, but I'd still like to know how to infinitively loop program.

/*
* 13-sided Die Roller.
*/

#include <stdio.h>

int main(void){

int w;

int x=0;
int y;
int z;

printf("Press 1 to run program\n");

printf("Press 2 to cancel.\n");

printf("Press 3 for more information.\n");
scanf("%d", &y);

switch(y){

case 1:
printf("Enter number of times you would like to roll:");
scanf("%d", &w);
srand(time(NULL));
while(x<w){
printf("%d\n", 1+rand()%13);
x++;
}
break;
case 2:
printf("Program terminated.");
break;
case 3:
printf("This program will roll a 13 sided die once.\n\n");
switch(z){
default:
printf("Press 1 to run program:");
scanf("%d", &z);
if(z == 1){

printf("Enter number of times you would like to roll:");
scanf("%d", &w);
srand(time(NULL));
while(x<w){
printf("%d\n", 1+rand()%13);
x++;
}
}
else
{
printf("Please enter a correct argument:");
}
break;
}
break;
default:
printf("Please enter a correct argument.");
break;
}
return 20;
}

[Bachstelze]

Don't use scanf (http://c-faq.com/stdio/scanfprobs.html)

To loop infinitely:


for (;;) {
/* Your stuff. */
if (key_pressed == 2)
break;
}

Or


int continue = 1;
while (continue) {
/* Your stuff. */

if (key_pressed == 2)
continue = 0;
}