why my code is wrong?

Question

i need to make this
ex:
matrix 2x3

1 2 3
4 5 6
then it will change like this

1 2 3 6 --> Last column is sum of row 1+2+3
4 5 6 15 --> Last column is sum of row 4+5+6

this is my code
https://code.sololearn.com/c6QpLQXeuw7z

Answer 1

oh thanks gordie 😊