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1 #include "stdio.h"
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2
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3 int main( int ac, char *av[])
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4 {
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5 int n;
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6 n = atoi(av[1]);
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7 goto factorial(n,1,n,print,return,environment);
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8 }
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9
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10 code print(int n,int result,int orig,code(*print)(),(*exit1)(),void*exit1env)
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11 {
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12 printf("%d! = %d\n",n, result);
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13 goto (*exit1)(1),exit1env;
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14 }
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15
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16 code factorial(int n,int result,int orig,code(*print)(),code(*exit1)(),
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17 void *exit1env)
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18 {
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19 if (n<0) {
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20 printf("err %d!\n",n);
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21 goto (*exit1)(0),exit1env;
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22 }
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23 if (n==0)
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24 goto (*print)(n,result,orig,print,exit1,exit1env);
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25 else {
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26 result *= n;
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27 n--;
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28 goto factorial(n,result,orig,print,exit1,exit1env);
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29 }
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30 }
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