untitled3.m

有五个学生

#include "stdio.h" 
struct student 
{ 
char num[6]; 
char name[8]; 
int score[3]; 
float avr; 
} stu[5]; 
main() 
{ 
int i,j,sum; 
FILE *fp; 
/*input*/ 
for(i=0;i<5;i++) 
{ 
printf("\n please input No. %d score:\n",i); 
printf("stuNo:"); 
scanf("%s",stu[i].num); 
printf("name:"); 
scanf("%s",stu[i].name); 
sum=0; 
for(j=0;j<3;j++) 
{ 
printf("score %d.",j+1); 
scanf("%d",&stu[i].score[j]); 
sum+=stu[i].score[j]; 
} 
stu[i].avr=sum/3.0; 
} 
fp=fopen("stud","w"); 
for(i=0;i<5;i++) 
if(fwrite(&stu[i],sizeof(struct student),1,fp)!=1) 
printf("file write error\n"); 
fclose(fp); 
}