Is this code valid: int array[5]; array[0] = 1; array[1] = 'A'; printf("%d\n", array[0]); printf("%d\n", array[1]);?

The code presented is indeed valid in the context of C programming. In the code snippet, an integer array of size 5 is declared, and the first two elements of the array are assigned values. The first element is assigned an integer value of 1, which is straightforward.

For the second element, 'A' is assigned. In C, a character is treated as an integer with respect to its ASCII value. Therefore, when 'A' is assigned to an element of an integer array, it implicitly converts to its corresponding ASCII integer value, which is 65. This means that assigning 'A' to an integer array is permissible due to the ability of C to perform this implicit conversion from character to integer.

When the values are printed using printf, the first value (1) will be printed as is. When the second value (which contains the ASCII representation of 'A', or 65) is printed, it will also be displayed correctly as an integer. Therefore, the entire code executes without any errors, affirming its validity.

This ability to assign a character directly to an integer array and have it displayed as its ASCII value clearly demonstrates why the code is considered valid.