Help...why output is 01234( not 0)?

Question

void recurse(int u) {
if(u>0){recurse(u-1);}
cout<<u;
}
int main() {
int i=5;
recurse(i);
}

Answer 1

thats because after the function hits its last recursion the value of u is 0,but then it goes back to the recursion where the value of u is 1,goes out of the if braces and continues to the line "cout << u",and so on till u is 2,3 then 4.

to fix this,put an else expression after the braces,so it will set the value to 0 only if u is 0.