File: 02.4.c

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c-cpp-reference 2.0.2-8
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#include <stdio.h>

main()
{
    int n, m;

    printf("Enter a number: ");
    scanf("%d", &n);

    m = fact(n);
    printf("The factorial of %d is %d.\n", n, m);
    exit(0);
}

fact(n)
int n;
{
    if (n == 0)
        return(1);

    return(n * fact(n-1));
}