Printing array as sub blocks - arrays

Question

I have array and I am trying to print this array as sub blocks, where each block has size = 5.
the out put of this code not as I expected it just print the first 5 values. How to print the array as sub blocks?
int arr[298] = {some int values};
int in = 0;
int siz = 298;
int ii;
int rang = 5;
for (int i = 0; i < siz; i++) {
if (in <= siz) {
for (ii = in; ii < 5; ii++) {
printf("arr=%d \n", arr[ii]);
}
printf("------------\n");
}
ind = ind + rang;
}

Answer 1

Following your request for clarification in the comment section, there are a few problems with your code, for me the biggest one is that it's needlessly complicated, but the one you are looking for is in this line:
ind = ind + rang;
ind is is not declared in your code but I assume you mean in, the first time the inner loop runs in(ind) is 0 so it all goes well, after that in will be 5, you assign it to ii and the condition ii < 5 will never be true again, the body of the loop will never be executed.
I suppose you could fix it by using in as index for the array and scrap rang since it isn't needed, something like this:
int arr[298] = {some int values};
int in = 0;
int siz = 298;
for (int i = 0; i < siz; i++) {
//if (in < siz) { moving this into the for loop
for (int ii = 0; ii < 5 && in < siz; ii++, in++) {
printf("arr=%d \n", arr[in]);
}
printf("------------\n");
//}
}
Live demo: https://godbolt.org/z/YzG9sno1n
But you don't need a nested loop, there are a few ways you can do this, a simple one is to have a variable that controls the block size:
int arr[298] = {some int values};
int siz = 298;
int count = 5;
for (int i = 0; i < siz; i++) {
printf("arr=%d \n", arr[i]);
count--;
if (count == 0) {
printf("------------\n");
count = 5;
}
}
Live demo: https://godbolt.org/z/b4e8vWfhM
In the above code count serves as the control variable, the value in the index is printed 5 times and when it reaches 0 a separator is printed and it resets and starts the new block.
Another possible option is to use the index itself to separate the blocks, you know the remainder of a division is 0 when the numerator is divisible by the denominator, you can use that to your advantage:
int arr[298] = {some int values};
int siz = 298;
for (int i = 0; i < siz; i++) {
if (i % 5 == 0) { // && i != 0 if you want to skip the initial separator
printf("------------\n");
}
printf("arr=%d \n", arr[i]);
}
Live demo : https://godbolt.org/z/nne3z38rY
Finally you can/should use a constant value for size:
#include <stdio.h>
#define SIZE 298
int main() {
int arr[SIZE] = {some int values};
for (int i = 0; i < SIZE; i++) {
if (i % 5 == 0 && i != 0) { // skipping the initial separator
printf("------------\n");
}
printf("arr=%d \n", arr[i]);
}
}
Live demo: https://godbolt.org/z/Mc4Yh4cav

Answer 2

Instead of several for loops, you can use a single while loop.
int arr[298 ]={Some int Values};
int ind =0;
int siz= 298 ;
printf("------------\n");
while(ind<=siz-1){
printf("arr=%d \n",arr[ind]);
ind++;
if(ind%5==0){
printf("------------\n");
}
}
In this, you print the elements through 0 to 297, with a line of dashes printed if the index is divisible by 5, that is after every fifth element.