I have no idea how these output to these numbers and I don't know what they're for, anyone help?
Code:#include <stdio.h> int main() { /* my first program in C */ printf("Hello, World! \n\n"); printf("hello world 2 \n\n"); int int1 = 1; int int2 = 2; int int3 = (int1 + int2); printf("1 + 2 = %d \n\n",int3); double array1 [10] = {2.0, 4.0, 6.0}; printf ("%d \n\n",array1); double array2 [25] = {5.0, 2.0, 9.0}; printf ("%d \n\n",array2); return 0; }
Last edited by oods1; 01-24-2021 at 05:36 AM.
I am not sure if I understand your question...
sorry I typo' dOriginally Posted by Nikosant03
how do arrays work, and what are they for?
Example, how does:
get to 6356672Code:double array1 [10] = {2.0, 4.0, 6.0}; printf ("%d \n\n",array1);
6356672 was the address of array1. If you want the actual number you have to use the subscript operator, like array1[0], array1[1]...
I would recommend that you get a (e)book. Just guessing how thinks work will not get you far.
array = a street.
array[0] = a house on that street.
array[1] = the house next door.
You use arrays when you have to store multiple things of the same type.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
oh
so how would I printf a house?
Arrays are used to store data (they are buffers). If you want read the data inside the array you need to read the index of the array. For example:
run the above hereCode:#include <stdio.h> #define array_size 10 int main() { char my_array[array_size] = {1,2,3,4,5,6,7,8,9,10}; // declare an array of size 10 where each element is one byte (char) in size // print every index of my_array for(char i =0 ; i<array_size; i++){ printf("my_array index %d is: %d \n",i,my_array[i]); } return 0; }
> so how would I printf a house?
One at a time.
There is one exception...
A char array (and ONLY a char array) can be printed in a single printf call.Code:char sentence[] = "The cat sat on the mat"; printf("%s\n", sentence);
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
