CodePudding user response:

Every time after I haven't been initialized to sum and so on the basis of each execution is the last time to continue to the added value of the sum,
Suggested that in the first layer for circulation, sum=0 on the first sentence,

CodePudding user response:

Look of microcomputer interface is university classroom VC6.0

CodePudding user response:

May be a dev - c,