尼玛 根本不会

#include"stdio.h"#define N 45int inputSS(char names[][20],int score[],int num);void printSS(char names[][20],int score[],int num);void getMAX(char names[][20],int score[],int num);int main(){char names[N][20];int score[N];int num=0;int choose;printf("what do you want to do:INPUT(1),OUTPUT(2),MAX(3),EXIT(0):");scanf("%d",&choose);do{ switch(choose){case 1:num=inputSS(names,score,num);break;case 2:printSS(names,score,num);break;case 3:getMAX(names,score,num);}printf("\nwhat do you want to do;INPUT(1),OUTPUT(2),MAX(3),EXIT(0):");scanf("%d",&choose);}while(choose!=0);}   int inputSS(char names[][20],int score[],int num){   int n,i;   printf("\nThis Time,how many students do you want to input:");   scanf("%d",&n);   if((n+num)>N||n<1){   printf("not valid sum\n");   return -1;   }   printf("NOW INPUT AS(NAME SCORE):\n");   for(i=0;i<n;i++){   printf("%d",i);   scanf("%s %d",&names[i+num],&score[i+num]);   }   printf("THIS TIME,INPUT IS OVER\n");   return num+n;   }   void printSS(char names[][20],int score[],int num){   int i;   if(num==0){   printf("NO STUDENTS NOW\n");   return;   }   printf("\nNOW ,THE STUDENTS SCORES AS FOLLOWS\n");   for(i=0;i<num;i++)   printf("%2d.name:%10s score:%3d\n",i,names[i],score[i]);   }   void getMAX(char names[][20],int score[],int num){   int i,max_index,max_score;   if(num==0){   printf("NO STUDENTS NOW\n");   return;   }   max_index=0;   max_score=score[0];   for(i=1;i<num;i++)   if(score[i]>max_score){   max_score=score[i];   max_index=i;   }   printf("The Top Score is %d by %s\n",score[max_index],names[max_index]);   }