对于课程，我的任务是设置必须的轮盘赌轮：
我使用for循环动画我的Wheel并且随机获胜我只需要用户输入的帮助。
对于我的用户输入，我现在感谢所有评论和反馈：
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);}
这很有效，我测试了几个数字并得到了我想要的结果。现在任何人都可以帮助我使用它来触发我的动画吗？
希望使用＆＃39;结果＆＃39;通过if语句触发动画，但程序跳过整个部分并无论如何都要播放动画。如果有人知道如何强制程序检查stdin控制台或可以看到一个方法，请帮助！
我是初学者，所有评论都很有价值，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提出了更好的建议，我会全力以赴。
源代码的其余部分：
#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 ); }
答案 0 :(得分：1)
为什么在需要号码时会读取字符串？
更好的做法是scanf为int并检查数字是否符合您的要求。
Atoi可能无法转换字符串并返回值0或1 ...
尝试扫描％d ...
答案 1 :(得分：0)
您希望如何使用此代码处理大于10的输入？
char userbet[2]; // Only 2 characters!
scanf( "%s" , userbet); // %s means string, which means it ends with a \0 terminator.
10或更高的输入看起来像：
[1] [0] [\0-terminator].
这是3个字符！