我正在进行一些简单的 C 编程练习，这是为了设计一个棒人并改变程序的一部分（例如它的颜色等......）。基本的东西，我猜，但我遇到了麻烦。
到目前为止，我已经设计了一个棒人，使用getch()函数进行了一些用户交互，我正试图让棒人（使用filled_circle函数）的填充头部成为与用户选择的颜色相同。
我通过将key_entered声明为int作为it = getch()来尝试此操作，我认为通过输入'key_entered'获取filled_circle函数的颜色，这可以解决问题，但它没有和我'我不太清楚为什么？
我也尝试使用 ascii颜色编码，而不是只输入单词，但没有真正有任何区别。
到目前为止，这是我的代码：
#include <graphics_lib.h>
#include <conio.h>
#include <stdio.h>
int main(void)
{
/* Declare two variables for the x and y positions */
int x_position, y_position;
int number_entered;
int number_entered2;
/* Open a graphics window */
/* Make it 640 pixels wide by 480 pixels high */
initwindow(640, 480);
/* Set up some coordinates */
x_position = 320;
y_position = 140;
printf("Enter a number between 100 and 320 for the horizontal position of the stick man\n");
scanf("%d", &number_entered);
printf("Enter a number between 90 and 140 for the vertical position of the stick man\n");
scanf("%d", &number_entered2);
printf("You have entered a horizontal position of %d\n", number_entered);
printf("and a vertical position of %d\n", number_entered2);
if ((number_entered < 100) || (number_entered2 < 90))
printf("The number or numbers you have entered are invalid, you cannot go beyond this point\n");
else if ((number_entered > 320) || (number_entered2 > 140))
printf("The number or numbers you have entered are invalid, you cannot go beyond this point\n");
else if ((number_entered >= 100 <= 320) && (number_entered2 >=90 <=140))
{
/*This list allows the user to choose the colour*/
printf("Now select the colour of the stick man, choose from the following colours by entering the letter beside each option\n");
printf("BLUE - B\n");
printf("GREEN - G\n");
printf("RED - R\n");
printf("CYAN - C\n");
printf("LIGHTMAGNETA - L\n");
printf("YELLOW - Y\n");
printf("WHITE - W\n");
/* choose red pen colour */
/*Now using switch statements the user should now choose a colour of which the cases are insensitive*/
int key_entered;
{
key_entered = getch();
switch (key_entered)
{
case 'B':
printf("You have Selected the BLUE colour\n");
setcolor(1);
break;
case 'b':
printf("You have Selected the BLUE colour\n");
setcolor(1);
break;
case 'G':
printf("You have Selected the GREEN colour\n");
setcolor(2);
break;
case 'g':
printf("You have Selected the GREEN colour\n");
setcolor(2);
break;
case 'R':
printf("You have Selected the RED colour\n");
setcolor(4);
break;
case 'r':
printf("You have Selected the RED colour\n");
setcolor(4);
break;
case 'C':
printf("You have Selected the CYAN colour\n");
setcolor(3);
break;
case 'c':
printf("You have Selected the CYAN colour\n");
setcolor(3);
break;
case 'L':
printf("You have Selected the LIGHTMAGNETA colour\n");
setcolor(13);
break;
case 'l':
printf("You have Selected the LIGHTMAGNETA colour\n");
setcolor(13);
break;
case 'Y':
printf("You have Selected the YELLOW colour\n");
setcolor(14);
break;
case 'y':
printf("You have Selected the YELLOW colour\n");
setcolor(14);
break;
case 'W':
printf("You have Selected the WHITE colour\n");
setcolor(15);
break;
case 'w':
printf("You have Selected the WHITE colour\n");
setcolor(15);
break;
default:
printf("The letter you selected is invalid\n");
}}
/* draw a circle on the screen buffer
at x_position, y_position
with radius 10 and fill colour using the filled_circle function */
filled_circle(number_entered, number_entered2, 40, getch());
/*the co_ordinates for the body*/
line(number_entered, number_entered2 + 40, number_entered, number_entered2 + 180, 5);
/*the co_ordinates for the arms*/
line(number_entered - 50, number_entered2 + 110, number_entered + 50, number_entered2 + 110, 5);
/*the co_ordinates for the left leg*/
line(number_entered, number_entered2 + 180, number_entered - 50, number_entered2 + 240, 5);
/*the co_ordinates for the right leg*/
line(number_entered, number_entered2 + 180, number_entered + 50, number_entered2 + 240, 5);
/* move the contents of the screen buffer to the display */
update_display();
}
/* Wait for a key press */
getch();
/* remove the display */
closegraph();
return 0;
}
有人能帮帮我吗？提前谢谢。
答案 0 :(得分：0)
假设您的filled_circle函数的最后一个参数是一种颜色，并且它是int，那么您的代码应该是以下内容（从switch语句的正上方到你的filled_circle电话：
int selected_color = 0; // or whatever type this is if not an 'int'
switch (getch())
{
case 'b': case 'B':
printf("You have Selected the BLUE colour\n");
selected_color = 1;
break;
case 'g': case 'G':
printf("You have Selected the GREEN colour\n");
selected_color = 2;
break;
case 'r': case 'R':
printf("You have Selected the RED colour\n");
selected_color = 4;
break;
case 'c': case 'C':
printf("You have Selected the CYAN colour\n");
selected_color = 3;
break;
case 'l': case 'L':
printf("You have Selected the LIGHTMAGNETA colour\n");
selected_color = 13;
break;
case 'y': case 'Y':
printf("You have Selected the YELLOW colour\n");
selected_color = 14;
break;
case 'w': case 'W':
printf("You have Selected the WHITE colour\n");
selected_color = 15;
break;
default:
printf("The letter you selected is invalid\n");
break;
}
/* draw a circle on the screen buffer
at x_position, y_position
with radius 10 and fill colour using the filled_circle function */
filled_circle(number_entered, number_entered2, 40, selected_color);
请注意，您可能还想检查是否selected_color == 0，以便您知道从未选择过某种颜色。