080.mycat和mycopy

模拟notepad查看txt功能以及模拟复制文件的功能。
Linux。   cat和cp

#include<stdio.h>
#include<stdlib.h>
void main(int l_length, char **l_arr) {
 if (l_length != 3) {
  return;
 }
 FILE * l_fp_read = fopen(l_arr[1], "r");
 FILE * l_fp_write = fopen(l_arr[2], "w");
 if (l_fp_read != NULL) {
  if (l_fp_write != NULL) {
   char l_temp = getc(l_fp_read);
   while (l_temp != EOF) {
    putc(l_temp, l_fp_write);
    l_temp = getc(l_fp_read);
   }
   fclose(l_fp_write);
  }

  fclose(l_fp_read);
 }
}