向二进制文件输入正整数

[c]代码库

/* 实现向二进制文件输入正整数功能 */
#include <stdio.h>

void fput_int(int data, FILE * fp) {
	char * s;
	int i;
	s = (char *) &data;
	for (i = 0; i < sizeof(int) && !feof(fp); ++i) {
		fputc(s[i], fp);
	}
}

int main(void) {
	FILE * fp = NULL;
	int i;

	fp = fopen("file.txt", "wb");
	if (NULL == fp) {
		printf("Can't open file \"test.txt\"");
		return -1;
	}

	for (i = 0; i < 10; ++i)
		fput_int(i, fp);

	fclose(fp);
	fp = NULL;

	return 0;
}