How do you write a C program to find the total and average of three numbers in an array?

Answer 1

Use the following functions:

int sum (const int* const a, const unsigned size) {

int s = 0;

for (unsigned i=0; i<size; ++i) s += a[i];

return s;

}

double average (const int* const a, const unsigned size) {

return (double) sum (a, size) / size;

}

Example usage:

int main () {

int[3] a = {74, 42, 64};

printf ("Sum = %d\n", sum (a, 3)); // Sum = 180

printf ("Average = %d\n", average (a, 3)); // Average = 60.0

return 0;

}