如何实现scanf输入数值后，不换行printf输出？

[xraycrl]

比如用scanf输入波长的数值后紧接着用printf输出单位“m”，而不会出现换行后才出现“m”？求大虾们指点，谢谢！

[luciferisnotsatan]

那就直接用系统api，别用scanf。
另外，你得想下怎么让系统知道你输入完了。scanf是敲下回车。

[BABY]

getchar

[至善者善之敌]

char str[1000];
	scanf("%s",str);
	printf("%d m",atoi(str));

[wangw89]

[Quote=引用 3 楼 babilife 的回复:]
C/C++ code

char str[1000];
scanf("%s",str);
printf("%d m",atoi(str));
[/Quote]觉得这个可以吧

[大IP]

你想要的结果是在控制台输入：5m，4m这样的数据，以表示是波长而非简单的数字。要实现这个操作不难，只要注意处理m字符就行了。请看如下代码：

#include <stdio.h>

int main(int argc, char** argv)
{
 	int t;
        int z;
	scanf("%d", &t);
	getchar();---去除键盘缓冲区内的m
	scanf("%d",&z);
        getchar();--去除键盘缓冲区内的m
	printf("%d\n",z);
	printf("%d\n",t);

	return 0;
}

在终端输入：

4m
5m

结果为：
4
5

[赵4老师]

#include <windows.h>
#include <stdio.h>

void ConPrint(char *CharBuffer, int len);
void ConPrintAt(int x, int y, char *CharBuffer, int len);
void gotoXY(int x, int y);
void ClearConsole(void);
void ClearConsoleToColors(int ForgC, int BackC);
void SetColorAndBackground(int ForgC, int BackC);
void SetColor(int ForgC);
void HideTheCursor(void);
void ShowTheCursor(void);

int main(int argc, char* argv[])
{
   HideTheCursor();
   ClearConsoleToColors(15, 1);
   ClearConsole();
   gotoXY(1, 1);
   SetColor(14);
   printf("This is a test...\n");
   Sleep(500);
   ShowTheCursor();
   SetColorAndBackground(15, 12);
   ConPrint("This is also a test...\n", 23);
   SetColorAndBackground(1, 7);
   ConPrintAt(22, 15, "This is also a test...\n", 23);
   gotoXY(0, 24);
   SetColorAndBackground(7, 1);
   return 0;
}

//This will clear the console while setting the forground and
//background colors.
void ClearConsoleToColors(int ForgC, int BackC)
{
   WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);
   //Get the handle to the current output buffer...
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   //This is used to reset the carat/cursor to the top left.
   COORD coord = {0, 0};
   //A return value... indicating how many chars were written
   //not used but we need to capture this since it will be
   //written anyway (passing NULL causes an access violation).
   DWORD count;

   //This is a structure containing all of the console info
   // it is used here to find the size of the console.
   CONSOLE_SCREEN_BUFFER_INFO csbi;
   //Here we will set the current color
   SetConsoleTextAttribute(hStdOut, wColor);
   if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
   {
      //This fills the buffer with a given character (in this case 32=space).
      FillConsoleOutputCharacter(hStdOut, (TCHAR) 32, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);

      FillConsoleOutputAttribute(hStdOut, csbi.wAttributes, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
      //This will set our cursor position for the next print statement.
      SetConsoleCursorPosition(hStdOut, coord);
   }
}

//This will clear the console.
void ClearConsole()
{
   //Get the handle to the current output buffer...
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   //This is used to reset the carat/cursor to the top left.
   COORD coord = {0, 0};
   //A return value... indicating how many chars were written
   //   not used but we need to capture this since it will be
   //   written anyway (passing NULL causes an access violation).
   DWORD count;
   //This is a structure containing all of the console info
   // it is used here to find the size of the console.
   CONSOLE_SCREEN_BUFFER_INFO csbi;
   //Here we will set the current color
   if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
   {
      //This fills the buffer with a given character (in this case 32=space).
      FillConsoleOutputCharacter(hStdOut, (TCHAR) 32, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
      FillConsoleOutputAttribute(hStdOut, csbi.wAttributes, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
      //This will set our cursor position for the next print statement.
      SetConsoleCursorPosition(hStdOut, coord);
   }
}

//This will set the position of the cursor
void gotoXY(int x, int y)
{
   //Initialize the coordinates
   COORD coord = {x, y};
   //Set the position
   SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

//This will set the forground color for printing in a console window.
void SetColor(int ForgC)
{
   WORD wColor;
   //We will need this handle to get the current background attribute
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   CONSOLE_SCREEN_BUFFER_INFO csbi;

   //We use csbi for the wAttributes word.
   if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
   {
      //Mask out all but the background attribute, and add in the forgournd color
      wColor = (csbi.wAttributes & 0xF0) + (ForgC & 0x0F);
      SetConsoleTextAttribute(hStdOut, wColor);
   }
}

//This will set the forground and background color for printing in a console window.
void SetColorAndBackground(int ForgC, int BackC)
{
   WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);;
   SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), wColor);
}

//Direct console output
void ConPrint(char *CharBuffer, int len)
{
   DWORD count;
   WriteConsole(GetStdHandle(STD_OUTPUT_HANDLE), CharBuffer, len, &count, NULL);
}

//Direct Console output at a particular coordinate.
void ConPrintAt(int x, int y, char *CharBuffer, int len)
{
   DWORD count;
   COORD coord = {x, y};
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
   SetConsoleCursorPosition(hStdOut, coord);
   WriteConsole(hStdOut, CharBuffer, len, &count, NULL);
}

//Hides the console cursor
void HideTheCursor()
{
   CONSOLE_CURSOR_INFO cciCursor;
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

   if(GetConsoleCursorInfo(hStdOut, &cciCursor))
   {
      cciCursor.bVisible = FALSE;
   }
}

//Shows the console cursor
void ShowTheCursor()
{
   CONSOLE_CURSOR_INFO cciCursor;
   HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

   if(GetConsoleCursorInfo(hStdOut, &cciCursor))
   {
      cciCursor.bVisible = TRUE;
   }
}

[xraycrl]

那就直接用系统api，别用scanf。
另外，你得想下怎么让系统知道你输入完了。scanf是敲下回车。



api是什么？
敲下回车是表示输入结束，并不表示换行啊？

[吾子墨鸿]

[Quote=引用 3 楼 babilife 的回复:]
C/C++ code

char str[1000];
scanf("%s",str);
printf("%d m",atoi(str));
[/Quote]
这个就符合要求了！

[_了凡_]

[Quote=引用 6 楼 zhao4zhong1 的回复:]

C/C++ code
#include <windows.h>
#include <stdio.h>

void ConPrint(char *CharBuffer, int len);
void ConPrintAt(int x, int y, char *CharBuffer, int len);
void gotoXY(int x, int y);
void ClearConsole(v……
[/Quote]
6楼的这个我也搞过，蛮有意思的，可以实现类似TC中conio.h的功能：
http://download.csdn.net/source/2604163
楼主的问题实际上就是“不用回车即可获得输入的内容”，这个要用系统API的，
上面的链接有兴趣的话看看吧，里面有输入立即返回的函数，之后的程序就是逻辑的
问题了。

[yan123wwwy]

[Quote=引用 6 楼 zhao4zhong1 的回复:]
C/C++ code
#include <windows.h>
#include <stdio.h>

void ConPrint(char *CharBuffer, int len);
void ConPrintAt(int x, int y, char *CharBuffer, int len);
void gotoXY(int x, int y);
void ClearCons……
[/Quote]
这位大哥，您这是。。。。肿么了。。。