《C程序设计语言》读书笔记20091106
书中有几个问题有点模糊。记录一下。
Answer to Exercise 1-7
Write a program to print the value of EOF .
#include <stdio.h>
int main(void)
{
printf("The value of EOF is %d\n\n", EOF);
return 0;
}
EOF在stdio.h中的定义为#define EOF (-1)
其中()被忽略,只使用-1。
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源码:
# include <stdio.h>
int main()
{
/* 定义了一个无符号字符型变量,此变量只能用来存储无符号数 */
unsigned char result;
int a, b, c, d;
a = 2;
b = 4; ......
源码:
# include <stdio.h>
int main()
{
int x, y;
printf("请输入自变量x:");
scanf("%d", &x);
if(x < 6)
{
  ......
源码:
# include <stdio.h>
int main( )
{
int radius;
double area;
for(radius = 1; radius <= 10 ; radius++)
{
area = 3.1416 * radius * radius;
......
源码:
/* 学生成绩查询系统 */
# include <stdio.h>
# include <stdlib.h>
int main( )
{
int select;
int i, j;
int score[5][7];
int average = 0;
int sum = 0;
&n ......
C Sharp(C#)中如何删除文件(文件夹)
直接删除:
using System.IO;
...
string filePath = @"D:\...\xxx.xxx";
if (File.Exists(filePath))
{
File.Delete(filePath);
}
else
{
Console. ......