Value of memory changed without permission

Question

I have an array with 2 dimensions and when I print the data of the array the first time, the date is printed correctly, but the other times the data of array[last][i] from i = 0

Answer 1

An array of length numero has numero elements. Going from index 0 to numero-1. You are treating them like they have an index numero. Switch out i <= numero for i < numero. Do the same for all for loops and with j.

Answer 2

The problem as I see it is, you're looping over with a condition check like

 for (unsigned int i = 0; i <= numero; i++) 

for an array defined as

unsigned int p_a[numero];

and you're going off-by-one. This is essentially invalid memory access which invokes undefined behavior.

C arrays have 0-based indexing, so the valid limit would be

for (unsigned int i = 0; i < numero; i++)

Answer 3

If you have an array declared as having numero elements then the valid range of indices is [0, numero-1].

Thus such loops like this

for (unsigned int i = 0; i <= numero; i++) {

used to access elements of an array with numero elements results in undefined behavior.