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计算平均分，并写到文本中
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#include <stdio.h>
#include <stdlib.h> #define N 30 typedef struct date_order{ int year; int month; int day; }DATE; typedef struct student { long studentID; char studentName[10]; char studentSex; DATE birthday; int score[4]; float aver; }STUDENT; void InputScore(STUDENT stu[],int n,int m) { int i,j; for(i = 0;i<n;i++) { printf("Input record %d:\n",i+1); scanf("%ld",&stu[i].studentID); scanf("%s",&stu[i].studentName); scanf(" %c",&stu[i].studentSex); scanf("%d",&stu[i].birthday.year); scanf("%d",&stu[i].birthday.month); scanf("%d",&stu[i].birthday.day); for(j=0;j<m;j++) { scanf("%d",&stu[i].score[j]); } } } void AverScore(STUDENT stu[],int n,int m) { int i,j,sum[N]; for(i=0;i<n;i++) { sum[i] = 0; for(j=0;j<m;j++) { sum[i] = sum[i] + stu[i].score[j]; } stu[i].aver = (float)sum[i]/m; } } void WritetoFile(STUDENT stu[],int n,int m) { FILE *fp; int i,j; if((fp = fopen("score.txt","w")) == NULL) { printf("Failuer to open score.txt\n"); exit(0); } for(i=0;i<n;i++) { fprintf(fp,"ld %8s < m / - / -",stu[i].studentID, stu[i].studentName, stu[i].studentSex, stu[i].birthday.year, stu[i].birthday.month, stu[i].birthday.day ); for(j = 0;j < m;j++) { fprintf(fp,"M",stu[i].score[j]); } fprintf(fp,"%6.1f\n",stu[i].aver); } fclose(fp); } int main() { STUDENT stu[N]; int n; printf("How many student?\n"); scanf("%d",&n); InputScore(stu,n,4); AverScore(stu,n,4); WritetoFile(stu,n,4); return 0; }