循环左移

#include <iostream>
#define N 50
using namespace std;

void reverse(int R[],int l,int r) {
    int i,j;
    for(i=l,j=r; i<j; i++,j--) {
            int temp = R[i];
            R[i] = R[j];
            R[j] = temp;
    }
}

void RCR(int R[],int n ,int p){
    if (p<=0||p>=n){
        cout<<"ERROR"<<endl;
    }else {
        reverse(R,0,p-1);
        reverse(R,p,n-1);
        reverse(R,0,n-1);
    }
}

int main(){
    int L,i;
    int R[N],n;
    cin>>L;
    cin>>n;
    for (i=0;i<n;i++){
        cout<<R[i]<<" ";
    }
    RCR(R,n,L);
    for(i=0;i<n;i++){
        cout<<R[i]<<" ";
    }
    cout<<endl;
    return 0;
}