mondai1_21_22.c

#include <stdio.h>

struct student {
  char name[20];
  int score;
} student;

int main()
{
  struct student student[5];
  int sum = 0, i, ave;
  for(i = 0; i < 5; i++) {
    printf("name score? ");
    scanf("%s %d",student[i].name, &student[i].score);
    sum = sum + student[i].score;
  }
  ave = sum / 5;
  printf("Average: %d\n", ave);

  printf("Students of above average:\n");

  for(i = 0; i < 5; i++) {
    if (ave < student[i].score) {
      printf("%s\n", student[i].name);
    }
  }
}


//mondai21.c

#include <stdio.h>

int main()
{
  int i;
  int num[5];
	FILE *fp;
	fp = fopen("test.txt","w");
  for (i = 0; i < 5; i++) {
    scanf("%d", &num[i]);
    fprintf(fp,"%d\n", num[i]);
  }
	fclose(fp);
}


//mondai22.c

#include <stdio.h>

int main()
{
  int i;
  int num[5];
  FILE *fp;
  fp = fopen("test.txt", "r");
  for(i = 0; i < 5; i++) {
    fscanf(fp,"%d", &num[i]);
    printf("%d\n", num[i]);
  }
  fclose(fp);
}