Function prototypes cont.

/* file cs_fnt.c to sum the integers from 1 to n */

int compute_sum(int n)

{

int sum = 0;

for ( ; n > 0; --n)

sum += n;

printf("%d\n", n); /* 0 is printed */

return (sum);

}

• Note that there are 4 identifiers i.e. n, sum in main() and compute_sum(), and call-by-value is adopted in parameter passing in this program.

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