Question

*Answer must be in C*

Write a complete program as follows (declare any necessary variables):

1. Create an array of doubles named “hummus” with 2 rows and 300 columns.
2. Initialize all array elements to zero.
3. Write a loop that will repeatedly ask the user to enter a value and store it in the first row of the array (do not overwrite previously entered values) until the whole first row is populated with the user input. (hint the loop should have the same number of iterations as the number of columns in the array)
4. Write a function (both prototype and definition) that populates the second row of the array with twice the values in the first-row elements respectively. Call the function in main. Finally, exit the program.

Answer 1

#include <stdio.h>

void populate(double hummus[][300]);

int main() {
    // Create an array of doubles named "hummus" with 2 rows and 300 columns.
    int i, j;
    double hummus[2][300];

    //Initialize all array elements to zero.
    for (i = 0; i < 2; ++i) {
        for (j = 0; j < 300; ++j) {
            hummus[i][j] = 0;
        }
    }

    // Write a loop that will repeatedly ask the user to enter a value and store it in the first row of the array (do not overwrite previously entered values) until the whole first row is populated with the user input.
    // (hint the loop should have the same number of iterations as the number of columns in the array)
    for (i = 0; i < 300; ++i) {
        printf("Enter a number: ");
        scanf("%lf", &(hummus[0][i]));
    }

    populate(hummus);
    return 0;
}

// Write a function (both prototype and definition) that populates the second row of the array with twice the values in the first-row elements respectively.
// Call the function in main. Finally, exit the program.
void populate(double hummus[][300]) {
    int i;
    for (i = 0; i < 300; ++i) {
        hummus[1][i] = hummus[0][i] * 2;
    }
}