c - 清屏后添加额外空间

Question

我有以下代码:

#include <unistd.h>
#include <stdio.h>
#include <stdbool.h>

#define RESET "\x1b[1J"

#define D "\x1b[0m"
#define Y "\x1b[33;1m"
#define W "\x1b[37;1m"
#define B "\x1b[30;1m"

void printLeft(bool color)
{
  if (color) {
    printf(Y "               __\n"
           "              /  |\n"
           "             /   \\\n"
           "            /     |\n"
           W "      _\\|  " Y "|" W "[" B "*" W "][" B "*" W "]" Y "|  " W "|/_\n"
           "        \\  " Y "|      |  " W "/\n"
           "         --" Y "|" W "\\____/" Y "|" W "--\n"
           Y "           \\      |\n"
           "            \\     /\n"
           "             \\   |\n"
           W "             |" Y "\\__|" W "|\n"
           "             |    |\n"
           "           ==|    |==");
  } else {
    printf("               __\n"
           "              /  |\n"
           "             /   \\\n"
           "            /     |\n"
           "      _\\|  |[*][*]|  |/_\n"
           "        \\  |      |  /\n"
           "         --|\\____/|--\n"
           "           \\      |\n"
           "            \\     /\n"
           "             \\   |\n"
           "             |\\__||\n"
           "             |    |\n"
           "           ==|    |==");
  }
}

void printRight(bool color) {
  if (color) {
    printf(Y "               __\n"
           "              |  \\\n"
           "              /   \\\n"
           "             |     \\\n"
           W "        _\\|  " Y "|" W "[" B "*" W "][" B "*" W "]" Y "|  " W "|/_\n"
           "          \\  " Y "|      |  " W "/\n"
           "           --" Y "|" W "\\____/" Y "|" W "--\n"
           Y "             |      /\n"
           "             \\     /\n"
           "              |   /\n"
           W "             |" Y "|__/" W "|\n"
           "             |    |\n"
           "           ==|    |==");
  } else {
    printf("               __\n"
           "              |  \\\n"
           "              /   \\\n"
           "             |     \\\n"
           "        _\\|  |[*][*]|  |/_\n"
           "          \\  |      |  /\n"
           "           --|\\____/|--\n"
           "             |      /\n"
           "             \\     /\n"
           "              |   /\n"
           "             ||__/|\n"
           "             |    |\n"
           "           ==|    |==");
  }
}

void printBottom(bool color) {
  if (color) {
    printf(Y "               __\n"
           "              |  |\n"
           "             /    \\\n"
           "            |      |\n"
           "            |" W "[" B "*" W "][" B "*" W "]" Y"|\n"
           "            |      |\n"
           W "        _\\| " Y "|" W "\\____/" Y "| " W "|/_\n"
           "          \\/" Y "|      |" W "\\/\n"
           Y "            |      |\n"
           W "           /\\" Y "\\    /" W "/\\\n"
           "        ==/   " Y "|__|   " W "\\==");
  } else {
    printf("               __\n"
           "              |  |\n"
           "             /    \\\n"
           "            |      |\n"
           "            |[*][*]|\n"
           "            |      |\n"
           "        _\\| |\\____/| |/_\n"
           "          \\/|      |\\/\n"
           "            |      |\n"
           "           /\\\\    //\\\n"
           "        ==/   |__|   \\==");
  }
}

int main(int argc, char *argv[])
{
  short counter = 0;
  while (1) {
    printf(RESET);
    if (counter == 0) printLeft(true);
    else if (counter == 2) printRight(true);
    else printBottom(true);
    if (true) {
      printf(Y "\n\n\"IT'S PEANUT BUTTER JELLY TIME\"" D);
    } else {
      printf("\n\n\"IT'S PEANUT BUTTER JELLY TIME\"");
    }
    fflush(stdout);
    usleep(200000);
    counter = (counter + 1) % 4;
  }
  return 0;
}

除了一件事之外，一切都运转良好。第一行似乎添加了额外的空格:

如何去掉这个多余的空间？

Answer 1

虽然我无法使用系统上的控制代码进行测试，但您很可能在此文本后面需要一个 \n:

printf(Y "\n\n\"IT'S PEANUT BUTTER JELLY TIME\"\n" D);

至少，这解决了 Windows 系统上的相同问题(并且 Y 和 D 似乎是颜色控制代码，因此这不会影响位置无论如何)。

更新:

看起来像 position control code也存在(但无法在这里测试):

#define     GOTOYX   "\x1B[%.2d;%.2dH"
    Set cursor to (y, x). More...

因此，您可以使用此代码来定位第一行，而不是额外的换行符。