is it good or bad to reuse the variables?

Question

I wonder if it is good or bad (or does not matter) if I reuse the variable names as much as possible? for example

int main(void){
  //...
  int x=0;

  //..
         


        

Answer 1

  int x=0;

  //..
  x = atoi(char_var);

  //..
  int x = 0;

You cannot redeclare x in the same scope. If you are not redeclaring it but using it for different purposes, you are free to do this. But it's a bad practice and should be avoided as it decreases code readability. Also you should find meaningful names for your variables for the same reasons.