Qestions About The Array

[jacksparrow]

hello

how can i swap between the array

with to elements or couple of numbers for example i got

a { 5 , 2 , 3 , 7 }

b { 2 , 7 , 1 , 9 }

how can i swap between 2 and 7
7 & 3
1 & 2
3 & 7

what should i write i mean the code ?

[VictorN]

To swap elements i and j within the same int array a;

int temp = a[i];
a[i] = a[j];
a[j] = temp;

[jacksparrow]

can u explain to me the code cuz i didnt understand it

[VictorN]

No, sorry!
You seem to first must learn the basics of mathematics, logic and algorithms
and only after that - go on with basics of programming.

[sysop1911]

can u explain to me the code cuz i didnt understand it

int temp = a[i];
a[i] = a[j];
a[j] = temp;

He has created an integer variable called "temp" and assigned the value of a[i] to it. Then his has assigned the value of a[j] to a[i]. Finally, he assigned the value of a[i] (which was assigned to temp earlier) and assigned it to a[j].

a[i] goes into 'temp', a[j] goes into a[i], and temp goes into a[j]. Simple enough.