Sword means offer 33 arrange the array into the smallest number

Error code

classSolution { Public:    intFindgreatestsumofsubarray (vector<int>Array) {        intLength =array.size (); if(Length <=0) {Invalid=true; return 0; }        intsum =0; intMaxsum =0x80000000;  for(inti =0; I < length;i++){            if(Sum <0) Sum=Array[i]; Sum+=Array[i]; if(Sum >maxsum) Maxsum=sum; }        returnmaxsum; }    BOOLInvalid =false;};

sum + = array[i];  This sentence regardless of sum at less than 0 when the execution caused the error, the actual requirement should be less than 0 when not executed.
If you add else after the if is selective execution, not add is sequential execution, that is, regardless of the conditions to be executed. Note the IF after else selection.

Sword means offer 33 arrange the array into the smallest number