Update issue1.c

[compu-TEE]

### CHANGES MADE TO EACH FILE

1. The code copied the exact string, so iterating the for loop backwards gives the reversed string.
2. The code had a base case of 0 and was using multiplication, which would end up giving us 0 always. Instead, every even number was incremented by 2 starting from 2.
3. The code had a line where an entire array (array 1) was being stored as an element for the other array (array 2) when it just had to copy. So, the indexing of the array 1 was initialized.
4. The code was looping with the incorrect limits, corrected them.
5. In switch-case statements break is necessary as without it every other case after the desired case would be executed. Added break statements after every case.
6. The desired outputs were reversed in the if-else statement. Just interchanged them.
7. The code was trying to add an integer to a pointer. De-referenced a pointer so that the addition can take place.
8. The for loop iterates until the 100th element, but if the index of the null character is less than 100 then we get an undefined behavior. So, the for loop is now iterated until it reaches the null character.
9. The factorial of 2 was given to be 1 in the code, but it is 2 and the base case has to be either 0 or 1. The base case was changed and the number of 2 was incorporated in the code itself.