c++——补第一次作业1

#include <iostream.h>#include <fstream.h>#include <stdio.h>void writeinfile(int n);void main(){int  n,k,m,l,sum=0;n=100;/**********Program**********/for(m=2;m<=n;m++){for(k=2;k<m;k++){l=m%k;if(l==0){break;}}if(k==m)sum+=m;}cout<<sum<<endl;/**********  End  **********/writeinfile(sum);}void writeinfile(int n){fstream myfile;myfile.open(" f.txt" ,ios::out);myfile<<n<<endl;myfile.close();}