天梯赛L1-008 求整数段和 (10 分)

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    
    
    int s=0;
    int m,n;
    cin>>m>>n;
    int c=0;
    for(int i=m;i<=n;i++)s+=i;
    for(int i=m;i<=n;i++){
    
    
        printf("%5d",i);
        c++;
        if(c%5==0)cout<<endl;
    }
    if(c%5!=0)cout<<endl;
    cout<<"Sum = "<<s;
    return 0;
}