在类里面，我的任务是制作一个轮盘赌轮的动画，它必须:
- 从标准输入中读取对单个数字的一次有效投注。
- 随机选择一个中奖号码。
- 显示轮盘赌轮的动画，其中至少包含 2 个图像。 4.在动画最后的图像上显示用户投注、中奖号码和赔付金额(以每次投注值为1计算)。
我使用 for 循环对我的轮盘进行了动画处理，并随机产生了获胜者，我只需要用户输入方面的帮助。
对于我的用户输入，由于所有评论和反馈，我现在有了这个:
char userbet[3];
int result1;
scanf( "%s" , &userbet);
if(atoi(userbet) >=0 && atoi(userbet) <= 36){result1 = 1;
printf("you bet on number %s", &userbet);}
else {
printf("please enter a valid bet", &userbet);}
这有效，我测试了几个数字并得到了我想要的结果。现在有人可以帮我用它来触发我的动画吗？
希望使用“结果”通过 if 语句触发动画，但程序会跳过整个部分并无论如何播放动画。如果有人知道如何强制程序检查标准输入控制台或可以找到解决此问题的方法，请帮忙!
我是初学者，所有评论都很有值(value)，感谢您的阅读，我希望我的问题不会违反任何规则。感谢您的所有反馈!
如果有人对用户输入有更好的建议，我会洗耳恭听。
其余源代码:
#include <stdio.h>
#include <stdlib.h>
#include <gd.h>
#define USE_GLOBAL_COLORMAP 1
#define USE_LOCAL_COLORMAP 0
#define LOOP_ANIMATION_FOREVER 0
#define DO_NOT_LOOP_ANIMATION -1
#define AUTO_FRAME_DISPOSAL 1
#define ANIMATION_DELAY 1 /* in milliseconds */
#define IMAGE_WIDTH 640
#define IMAGE_HEIGHT 720
#define CIRCLE_DIAMETER 30
#define MAX_FRAMES_COUNT 70
#define MOVEMENT_PER_FRAME 10
int main( void )
{
FILE *animatedGIF;
gdImagePtr frameImage;
int yellow, black, red, green, brown, darkbrown, gold, silver, white, grey, frameCounter, drawingColor, number, WinningAngle;
int sliceCounter = 0;
int sliceStartingAngle = 0;
int sliceEndingAngle = 0;
int sliceAngleIncrement = 9;
int centerPointX = 320;
int centerPointY = 360;
int wheelDiameter = 560;
int insideCoverDiameter = 400;
int textPositionAngle = 367;
int textRotationAngle = 270;
int BallPositionAngle = 0;
int BallSpeed;
int Ballroute = 180;
double textPositionX, textPositionY, BallPositionX, BallPositionY;
double degreesToRadiansMultiplier = 0.0174532925;
char *pocketNumbers[] = { "32", "15", "19", "4", "21", "2", "25", "17", "34",
"6", "27", "13", "36", "11", "30", "8", "23", "10",
"5", "24", "16", "33", "1", "20", "14", "31", "9",
"22", "18", "29", "7", "28", "12", "35", "3", "26", "0" };
srand( time( 0 ) );
number = rand();
number = number % 100;
number++;
BallSpeed = number;
animatedGIF = fopen( "animation.gif", "wb" );
frameImage = gdImageCreate( IMAGE_WIDTH, IMAGE_HEIGHT );
gdImageColorAllocate( frameImage, 34, 139, 34 );
gdImageGifAnimBegin( frameImage, animatedGIF, USE_GLOBAL_COLORMAP, DO_NOT_LOOP_ANIMATION);
for ( frameCounter = 0; frameCounter <= MAX_FRAMES_COUNT; frameCounter++ )
{
gdImageDestroy( frameImage );
frameImage = gdImageCreate( IMAGE_WIDTH, IMAGE_HEIGHT );
gdImageColorAllocate( frameImage, 34, 139, 34 );
yellow = gdImageColorAllocate( frameImage, 255, 255, 0 );
green = gdImageColorAllocate( frameImage, 0, 190, 0 );
red = gdImageColorAllocate( frameImage, 255, 0, 0 );
black = gdImageColorAllocate( frameImage, 0, 0, 0 );
brown = gdImageColorAllocate( frameImage, 222, 184, 135 );
darkbrown = gdImageColorAllocate( frameImage, 139, 69, 19);
gold = gdImageColorAllocate( frameImage, 255, 215, 0);
silver = gdImageColorAllocate( frameImage, 191, 192, 192);
white = gdImageColorAllocate( frameImage, 255, 255, 255 );
grey = gdImageColorAllocate( frameImage, 105, 105, 105 );
gdImageSetThickness( frameImage, 4 );
gdImageFilledArc(frameImage, centerPointX, centerPointY, 596, 596, 0, 360, brown, gdArc);
do {
sliceStartingAngle = sliceEndingAngle;
sliceEndingAngle = sliceStartingAngle + sliceAngleIncrement;
textRotationAngle -= sliceAngleIncrement;
textPositionAngle -= sliceAngleIncrement;
if ( sliceCounter == 36)
{
drawingColor = green;
sliceEndingAngle += 1;
textPositionAngle -= 3;
}
else if ( (sliceCounter % 2) == 0 )
{
drawingColor = red;
textRotationAngle += 2;
}
else
{
drawingColor = black;
sliceEndingAngle += 1;
textPositionAngle -= 1;
textRotationAngle -= 1;
}
if ( (sliceCounter % 5) == 0 ) sliceEndingAngle += 1;
if ( (sliceCounter % 7) == 6 ) { textPositionAngle -= 1; textRotationAngle -= 8; }
if ( (sliceCounter % 13) == 12 ) textPositionAngle -= 1;
textPositionX = (cos(textPositionAngle * degreesToRadiansMultiplier) * (wheelDiameter / 2.25)) + centerPointX;
textPositionY = centerPointY - (sin(textPositionAngle * degreesToRadiansMultiplier) * (wheelDiameter / 2.25));
gdImageFilledArc( frameImage, centerPointX, centerPointY, wheelDiameter, wheelDiameter, sliceStartingAngle, sliceEndingAngle, drawingColor, gdArc );
gdImageStringFT( frameImage, NULL, white, "Vera.ttf", 14, textRotationAngle * degreesToRadiansMultiplier, textPositionX, textPositionY, pocketNumbers[ sliceCounter ] );
}while (++sliceCounter < 37 );
gdImageFilledArc(frameImage, centerPointX, centerPointY, 400, 400, 0, 360, grey, gdArc);
gdImageFilledArc(frameImage, centerPointX, centerPointY, 320, 320, 0, 360, black, gdArc);
gdImageArc(frameImage, centerPointX, centerPointY, 400, 400, 0, 360, gold);
gdImageFilledArc(frameImage, centerPointX, centerPointY, 100, 100, 0, 360, black, gdArc);
gdImageFilledArc(frameImage, centerPointX, centerPointY, 20, 20, 0, 360, silver, gdArc);
gdImageFilledArc(frameImage, centerPointX, 345, 10, 20, 0, 360, silver, gdArc);
gdImageFilledArc(frameImage, centerPointX, 375, 10, 20, 0, 360, silver, gdArc);
gdImageFilledArc(frameImage, 335, centerPointY, 20, 10, 0, 360, silver, gdArc);
gdImageFilledArc(frameImage, 305, centerPointY, 20, 10, 0, 360, silver, gdArc);
gdImageArc(frameImage, centerPointX, centerPointY, 460, 460, 0, 360, gold);
gdImageArc(frameImage, centerPointX, centerPointY, 600, 600, 0, 360, darkbrown);
if ( frameCounter == 70 ) {
BallPositionX = (cos( degreesToRadiansMultiplier * BallPositionAngle ) * 215) + centerPointX;
BallPositionY = centerPointY - (sin( degreesToRadiansMultiplier * BallPositionAngle ) * 215);
gdImageFilledEllipse( frameImage, BallPositionX, BallPositionY, CIRCLE_DIAMETER, CIRCLE_DIAMETER, silver );
BallPositionAngle = WinningAngle; }
else if(frameCounter >= 20) {
BallPositionX = (cos( degreesToRadiansMultiplier * BallPositionAngle ) * Ballroute) + centerPointX;
BallPositionY = centerPointY - (sin( degreesToRadiansMultiplier * BallPositionAngle ) * Ballroute);
gdImageFilledEllipse( frameImage, BallPositionX, BallPositionY, CIRCLE_DIAMETER, CIRCLE_DIAMETER, silver ); }
sliceCounter = 0;
sliceStartingAngle = 0;
sliceEndingAngle = 9;
textPositionAngle = 367;
textRotationAngle = 270;
BallPositionAngle = 0;
sliceStartingAngle += 9 * frameCounter;
sliceEndingAngle += 9 * frameCounter;
textPositionAngle -= 9 * (frameCounter + 1);
textRotationAngle -= 9 * (frameCounter + 1);
BallPositionAngle += BallSpeed * (frameCounter);
gdImageGifAnimAdd( frameImage, animatedGIF, USE_GLOBAL_COLORMAP, 0, 0, ANIMATION_DELAY, AUTO_FRAME_DISPOSAL, NULL ); }
//sliceCounter = (WinningAngle / 9);
//gdImageStringFT( frameImage, NULL, white, "Vera.ttf", 14, 0, centerPointX, centerPointY, pocketNumbers[ sliceCounter ] ); }
gdImageGifAnimEnd( animatedGIF );
fclose( animatedGIF );
gdImageDestroy( frameImage ); }
最佳答案
当你需要一个数字时为什么要读取一个字符串？
最好的做法是 scanf 查找 int 并检查该数字是否符合您的要求。
Atoi 可能无法转换字符串并返回 0 或 1 值...
尝试扫描 %d...
关于C 动画轮盘，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23065620/