函数名: getw
头文件：<stdio.h>
函数原型: int getw(FILE *strem);
功 能: 从流中取一整数
参 数：stream为要操作的流
返回值：成功 返回从流中读取的整数 ，文件结束或者出错 返回-1。
程序例: 在文件中写入整数word，再从文件中读取数据，并将结果输出
#include<stdio.h>
#include<string.h>
#define FNAME "test.bat"
int main(void){
FILE *fp = fopen(FNAME, "wb");
if (fp == NULL) {
printf("Error opening file %s\n", FNAME);
exit(1);
}
int word = 94;
putw(word,fp);
if (ferror(fp)){
printf("Error writing to file\n");
}else{
printf("Successful write %d\n",word);
}
fclose(fp);
fp = fopen(FNAME, "rb");
if (fp == NULL) {
printf("Error opening file %s\n", FNAME);
exit(1);
}
word = getw(fp);
if (ferror(fp)){
printf("Error reading file\n");
}else{
printf("Successful read: word = %d\n", word);
}
fclose(fp);
return 0;
}
运行结果
Successful write 94 Successful read: word = 94
本文固定URL：https://www.dotcpp.com/course/522