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This program is designed to add three numbers, 1, 2, and 3. But when we run it, the program produces the result:
Sum is 1343432864
Why?
1 /************************************************
2 * sum_test -- Test the sum function *
3 ************************************************/
4 #include <stdio.h>
5
6 /************************************************
7 * sum -- Sum up three numbers *
8 * *
9 * Returns: The sum of the numbers. *
10 ************************************************/
11 int sum(i1, i2, i3)
12 {
13 int i1; /* The first number */
14 int i2; /* The second number */
15 int i3; /* The third number */
16
17 return (i1 + i2 + i3);
18 }
19
20 int main()
21 {
22 printf("Sum is %d\n", sum(1, 2, 3));
23 return (0);
24 }
25
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"Yacc" owes much to a most stimulating collection of users, who have goaded me beyond my inclination and frequently beyond my ability in their endless search for "one more feature." Their irritating unwillingness to learn how to do things my way has usually led to my doing things their way; most of the time, they have been right.
- S. C. Johnson, "Yacc guide acknowledgments"
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