5/7 C++ 練習二

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main(void)
{
    FILE *written;
    int a,i;
    written=fopen("random.txt","w");
    srand(time(NULL));

    for(i=1;i<=20;i++)
    {
        a=rand()%100;
        printf("%d ",a);
        fprintf(written,"%d ",a);
    }
    fclose(written);
    printf("\n=================================\n");
    FILE *read;
    int b;
    read=fopen("random.txt","r");
    printf("\n開出號碼大於50的有:\n");


    while((fscanf(read,"%d",&b))!=EOF)
    {
         if(b>50)
         {
         printf("%d\n",b);
         }

    }


    system("pause");
    return 0;
}