黄迪明9.3

/*9.3 重写主教材 9-6.cpp 程序，将在显示屏上输出文件内容改为计算文件中的字符个数。*/#include<stdio.h>#include<stdlib.h>main(int argc, char *argv[]) {     char ch;     FILE *fp;     int count = 0;     if (argc == 1)         printf("usage:no linenum  filename\n");     else if (argc > 2)         printf("Too many arguments to linenum\n");     else if ((fp = fopen(argv[1], "r")) == NULL)      {          printf("can't open %s\n", argv[1]);          return;      }     else      {         while ((ch = fgetc(fp)) != EOF)         count++;     fclose(fp);      }     printf("%s has %d chars\n", argv[1], count);     system("pause");     return 0; }