[代码实例][C语言]写入文本文件

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BUF_SIZE    1024
char buf[BUF_SIZE + 1];

int main(int argc, char * argv[])
{
if(argc != 2)
{
printf("Usage : %s <write_file>\n", argv[0]);
return EXIT_FAILURE;
}

FILE * fp;
char * file_name = argv[1];
size_t count;

if((fp = fopen(file_name, "w")) == NULL)
{
perror("fopen");
return EXIT_FAILURE;
}

char ch;
int index = 0;
while((ch = getchar()) != EOF)
{
buf[index++] = ch;
}
buf[index] = '\0';

if(fwrite(buf, 1, index, fp) != index)
{
perror("fwrite");
return EXIT_FAILURE;
}

if(fclose(fp) != 0)
{
perror("fclose");
return EXIT_FAILURE;
}

return EXIT_SUCCESS;
}