Vector of vector

#1

i have dougt in this Q
i am not getting this

#2

paste the question here in which you have issue in understanding.

#3

The statement vector< vector< int > > matrix(100, vector < int > (50, 100) ) declares :

vector < int > (50, 100) declares a vector X of type int with 50 elements each initialized to 100 and matrix consists of 100 vectors of type int each equal to X.

The statement will result in a compile-time error.

vector (50, 100) declares a vector X of type int with 100 elements each initialized to 50 and matrix consists of 100 vectors of type int each equal to X.

The statement will result in a run-time error.

#4

it is quiz Questionnnnnnnnnnnnnnnnnnnnnnnnnnnnn

#5

I don’t have access to the quiz. So you have to paste entire question with options here so that i can tell you which one is correct option. So just copy the question with option and paste here , rest I’ll do.

#6

The statement vector< vector< int > > matrix(100, vector < int > (50, 100) ) declares :

1.vector < int > (50, 100) declares a vector X of type int with 50 elements each initialized to 100 and matrix consists of 100 vectors of type int each equal to X.

2.The statement will result in a compile-time error.

3.vector (50, 100) declares a vector X of type int with 100 elements each initialized to 50 and matrix consists of 100 vectors of type int each equal to X.

4.The statement will result in a run-time error.

#7

Correct answer should be option 1 as, it Declares a 2D matrix of size 100*50 and each cell is initialised with value=100 i.e mat[I][j]=100 for all i in[0,100), and for all j in [0,50).

#8

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