Answered: Write a function that gets a 2-d array…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Write a function that gets a 2-d array of ints arr[height][width], and returns an array SUM of length height such that SUM[i] contains the sum of all values in the i’th row of

the array. For example

- On input {{ 1, 2, 3},

{4, 7, -2},

{9, 10, 11},

{1, 5, 4}};

the function returns { 6, 9, 30, 10}

// returns array SUM with SUM[i] = sum in the i’th row

int* sum_row(int height, int width, const int ar[height][width]);

Test for the function:

void test_q2() {

intar[4][3] = {{1, 2, 3},

{4, 7,-2},

{9,10,12},

{1, 5, 4}};

int* m = sum_row(4,3, ar);

intm0 = m[0];

intm1 = m[1];

intm2 = m[2];

intm3 = m[3];

free(m); // checking dynamic memory allocation

if (m0==6 && m1==9 && m2==31 && m3==10)

printf("Q2 ok\n");

else

printf("Q2 ERROR\n");

}

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