I want to assign every array with its index and this is my code.

#include <stdio.h>
#include <cs50.h>

int main(void) {
    int length = get_int("How many arrys do you need? ");
    int s[length];
    for (int i = 0; i < length; i  ) {
        s[i] = i;
        printf("s[i] = %d\n", i);
    }
 }

when run

s[i] = 0
s[i] = 1

so I want replace i in the code with its index number like this:

s[0] = 0 
s[1] = 1

CodePudding user response：

Your code is fine regarding the initialization of the array.

The printf statement should be changed to print both the index and the value stored at the index:

    printf("s[%d] = %d\n", i, s[i]);

Here is a modified version:

#include <cs50.h>
#include <stdio.h>

int main() {
    int length = get_int("How many array elements do you need? ");
    if (length <= 0 || length > 1024) {
        printf("invalid length: %d\n", length);
        return 1;
    }
    int s[length];
    for (int i = 0; i < length; i  ) {
        s[i] = i;
        printf("s[%d] = %d\n", i, s[i]);
    }
    return 0;
}