#include<stdio.h>#define N 40int ReadScore(int score[],long num[]);void DataSort(int score[],long num[],int n);void printfscore(int score[],long num[],int n);int main(){? ? int n,score[N];? ? long num;? ? ReadScore(score,num);? ? printf("Total students'ID and students are %d\n",num,n);? ? DataSort(score,num,n);? ? printf("Sorted score:");? ? printfscore(score,num,n);? ? return 0;}int ReadScore(int score[],long num[]){? ? int i=-1;? ? do? ? {? ? ? ? i++;? ? ? ? printf("Input students'ID and score:");? ? ? ? scanf("%ld%d",&num[i],&score[i]);? ? }while(score[i]>=0&&num[i]>0);? ? return i;}void DataSort(int score[],long num[],int n){? ?int i,j,k;? ?int temp1;? ?long temp2;? ?for(i=0;i<n-1;i++)? ?{? ? ? ?k=i;? ? ? ?for(j=i+1;j<n;j++)? ? ? ?{? ? ? ? ? ?k=j;? ? ? ?}? ? ? ?if(k!=1)? ? ? ?{? ? ? ? ? ?temp1=score[k];score[i]=score[k];score[i]=temp1;? ? ? ? ? ?temp2=num[k];num[k]=num[j];num[j]=temp2;? ? ? ?}? ?}}void printfscore(int score[],long num[],int n){? ? int i;? ? for(i=1;i<n;i++)? ? {? ? ? ? printf("%ld%d\n",num[i],score[i]);? ? }? ? printf("\n");}