尼玛 根本不会

#include"stdio.h"
#define N 45
int 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
[20];
int score
;
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]);
}