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/* count.c -- using standard I/O */
/* 命令行参数 */
#include <stdio.h>
#include <stdlib.h> // ANSI C exit() prototype
int main(int argc, char *argv[])
{
int ch; // place to store each character as read
// 读取时存储每个字符的位置
FILE *fp; // "file pointer"
// 文件指针
long count = 0;
if (argc != 2)
{
printf("Usage: %s filename\n", argv[0]);
exit(1);
}
if ((fp = fopen(argv[1], "r")) == NULL)
{
printf("Can't open %s\n", argv[1]);
exit(1);
}
while ((ch = getc(fp)) != EOF)
{
putc(ch,stdout); // same as putchar(ch)
count++;
}
fclose(fp);
printf("File %s has %ld characters\n", argv[1], count);
return 0;
}
int main(int argc, char *argv[])
{
}
if (argc != 2)
{
printf("Usage: %s filename\n", argv[0]);
exit(1);
}
if ((fp = fopen(argv[1], "r")) == NULL)
{
printf("Can't open %s\n", argv[1]);
exit(1);
}
while ((ch = getc(fp)) != EOF)
{
putc(ch,stdout); // same as putchar(ch)
count++;
}
fclose(fp);
printf("File %s has %ld characters\n", argv[1], count);