.求1！+2！+4！+8！+16！.用fur循环语句实现40347

#include "stdio.h"
int main(){
  int i,j;
  double sum=0;
  double s=1;
  for(i=1;i<=16;i++){
    for(j=1;j<=i;j++){
      s = s*j;
    }
    sum +=s;
  }
  printf("sum=%lf",sum);
  return 0;
}