浙大PAT 1036题 1036. Boys vs Girls

#include<stdio.h>
#include<string.h>
struct Stu{
char name[12];
char sex[2];
char id[12];
int grade;
}stu,higF,lowM;
int main(){
int i,j,n;
higF.grade=-1;lowM.grade=101;
scanf("%d",&n);
for(i=0;i<n;i++){
scanf("%s %s %s %d",stu.name,stu.sex,stu.id,&stu.grade);
if(strcmp(stu.sex,"F")==0&&stu.grade>higF.grade) higF=stu;
if(strcmp(stu.sex,"M")==0&&stu.grade<lowM.grade) lowM=stu;
}
if(higF.grade==-1) printf("Absent\n");
else printf("%s %s\n",higF.name,higF.id);
if(lowM.grade==101) printf("Absent\n");
else printf("%s %s\n",lowM.name,lowM.id);
if(higF.grade==-1||lowM.grade==101) printf("NA\n");
else printf("%d\n",higF.grade>lowM.grade?higF.grade-lowM.grade:lowM.grade-higF.grade);
return 0;
}