文件打开(fopen)、文件关闭(fclose)

• 文件打开(fopen)、文件关闭(fclose)

#include 
#include 
int main ()
{
     
   FILE *fp;
   fp = fopen ("data.txt", "w");	//写入文件
   fprintf(fp, "%s %s %s %d", "We", "are", "Chinese", 2020);
   fclose(fp);
   fp = fopen("data.txt", "r");//读文件
   if( fp != NULL )
   {
     
      printf("成功打开文件 data.txt\n");
      fclose(fp);
   }
   fp = fopen("data1.txt", "r");
   if( fp == NULL )
   {
     
      printf("不能打开文件 data1.txt\n");
      exit(1);
   }
   return(0);
}