信号与系统，阶跃函数u(t)u(t-k-a)在无穷上积分等于在0到t-a上∫dt又=（t-a）u（t-a）？ a是0到1的自然数 自然数求和的调用函数的c++解法
\u7f16\u5199\u4e2a\u7a0b\u5e8f\u5e2e\u52a9\u5c0f\u5b66\u751f\u5b66\u4e60\u4e58\u6cd5\u3002\u5229\u7528rand\u51fd\u6570\u4ea7\u751f\u4e24\u4e2a\u4e00\u4f4d\u6b63\u6574\u6570\u3002\u63a5\u7740\u8c03\u7528\u8be5\u51fd\u6570\u663e\u793a\u8bf8\u59823*4=\uff1f\u7684\u95ee\u9898\uff0cdelphi\u5199\u7684
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Edit2: TEdit;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Button2: TButton;
procedure Button2Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject); //\u751f\u6210\u6309\u94ae
var
i:integer;
begin
Label3.Caption:='?';
Randomize;
for I := 0 to 9 do
begin
Edit1.Text:=IntToStr(Random(i));
Edit2.Text:=IntToStr(Random(i));
end;
Button2.Enabled:=true;
end;
procedure TForm1.Button2Click(Sender: TObject); //\u7b54\u6848\u6309\u94ae
begin
label3.Caption:=IntToStr(StrToInt(Edit1.Text)*strtoint(Edit2.Text));
Button2.Enabled:=False;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
button2.Enabled:=false;
end;
#include
using namespace std;
int add(int a)
{
int b;
int sum=0;
for(b=1;b<=a;b++)
{
sum=sum+b;
}
return sum;
}
int main()
{
int a;
for(a=1;a<=100;a++)
{
cout<<"\u4ece0\u5230"<<a<<"\u7684\u81ea\u7136\u6570\u6c42\u548c"<<add(a)<<endl;
}
return 0;
}
绛旓細瑙佸浘
绛旓細绉垎杩囩▼涓紝浣跨敤鍒嗛儴绉垎锛涘叧閿槸鎶婃彙浣忎竴涓ц川锛闃惰穬鍑芥暟鐨勫鏁版槸鍗曚綅鍐插嚮鍑芥暟銆傝繃绋嬪涓嬪紡鎵绀猴細
绛旓細鍥犱负鐢ㄥ啿婵鍑芥暟鍖归厤娉曟椂姹傜殑鏄0-鍒0+鐨勫彉鍖栁u(t)=u(0-锛-u(0+锛夛紝鎸0-鍒0+鐩稿鍗曚綅璺冲彉鍑芥暟銆傛瘮濡傛垜鍙樺寲浜-9灏卞彲浠ョ敤0-鍒0+鍙樺寲-9螖u(t)琛ㄧず锛堢壒鎸0澶勭殑鍙樺寲閲忥級銆傝鏄綘鐢-9u(t)琛ㄧず锛岄偅灏变笉鏄崟浣嶈烦鍙樺嚱鏁颁簡銆
绛旓細淇″彿涓庣郴缁涓璯(t)鏄樁璺冨搷搴攇(t)锛屽畾涔変负绯荤粺鍦ㄥ崟浣闃惰穬淇″彿u(t)鐨勬縺鍔变笅浜х敓鐨勯浂鐘舵佸搷搴斻傞樁璺冨搷搴斿嵆婵鍔辨墍鍙戝嚭鐨勪俊鍙蜂负闃惰穬鍑芥暟锛屼骇鐢熶簡闆剁姸鎬佸搷搴旓紝鍗崇數璺殑鍌ㄨ兘鍏冨櫒浠跺鐢靛銆佺數鎰熺被鍏冧欢锛屾棤鍒濆鍌ㄨ兘锛屼粎鐢卞閮ㄦ縺鍔变綔鐢ㄨ屼骇鐢熺殑鍝嶅簲銆傚湪鐢靛瓙宸ョ▼鍜屾帶鍒剁悊璁轰腑锛岄樁璺鍝嶅簲鏄湪闈炲父鐭殑鏃堕棿涔嬪唴锛屼竴鑸...
绛旓細y = tu(t)y' = u(t)+t未(t)鍏朵腑锛歶(t)-- 鍗曚綅闃惰穬鍑芥暟 未(t)--Dirac - 未鍑芥暟銆
绛旓細D銆佹ц川鐨勪箰绔犱富棰 璁板繂绯荤粺涓庨潪璁板繂绯荤粺锛鏄淇″彿涓庣郴缁涔愮珷涓殑涓ょ涓嶅悓鏃嬪緥銆傚彲閫嗘у拰鍥犳灉鎬э紝鏄郴缁熻涓虹殑璋冩э紝绋冲畾鎬у拰鏃朵笉鍙樻у垯鏄叾鍜岃皭鐨勮妭鎷嶃傝嚦浜庣嚎鎬х郴缁燂紝瀹冨氨鍍忎竴涓氦鍝嶄箰鍥紝榻愭鎬у拰鍙姞鎬т负鍏跺熀鏈殑闊崇瑙勫垯銆傛渶鍚庣殑鎬荤粨 鍦ㄨ繖娈垫梾绋嬩腑锛屾垜浠璇佷簡鍗曚綅鍐叉縺涓庡崟浣闃惰穬鍑芥暟鍦ㄧ鏁ｄ笌杩炵画鏃堕棿...
绛旓細鍦ㄦ暟瀛︿腑锛屽鏋滃疄鏁板煙涓婄殑鏌愪釜鍑芥暟鍙互鐢ㄥ崐寮鍖洪棿涓婄殑鎸囩ず鍑芥暟鐨勬湁闄愭绾挎х粍鍚堟潵琛ㄧず锛岄偅涔堣繖涓嚱鏁板氨鏄闃惰穬鍑芥暟銆傞樁璺冨嚱鏁版槸鏈夐檺娈靛垎娈靛父鏁板嚱鏁扮殑缁勫悎銆傞樁璺冨嚱鏁版槸濂囧紓鍑芥暟锛t<0鏃讹紝鍑芥暟鍊间负0锛泃=0鏃讹紝鍑芥暟鍊间负1/2,锛泃>0鏃讹紝鍑芥暟鍊间负1銆傞樁璺冨搷搴攇(t)瀹氫箟涓猴細绯荤粺鍦ㄥ崟浣闃惰穬淇″彿u(t)鐨勬縺鍔变笅...
绛旓細瑙ｏ紱淇″彿鐨勫彉鎹㈠湪淇″彿涓庣郴缁涓崰鏈変妇瓒崇粡閲嶇殑鍦颁綅锛岃鐗㈢墷鎺屾彙銆傚垝绾块儴鍒嗘槸鐢变袱閮ㄥ垎缁勬垚鐨勪竴涓槸鍐叉縺鍑芥暟锛屽彟涓涓槸鎸囨暟鍑芥暟鍜闃惰穬鍑芥暟鐨勪箻绉傚悎骞舵椂瑕佹兂鍒板啿婵鏄樁璺冪殑瀵兼暟锛屾墍浠ワ蓟e鈭(鈥2t)u(t)锛解 姹傚鏁 =锛籩鈭(鈥2t)锛解*u(t)+锛籩鈭(鈥2t)锛*u(t)鈥=鈥2e鈭(鈥t)u(t)+e鈭...
绛旓細鍦ㄦ暟瀛︿腑锛屽鏋滃疄鏁板煙涓婄殑鏌愪釜鍑芥暟鍙互鐢ㄥ崐寮鍖洪棿涓婄殑鎸囩ず鍑芥暟鐨勬湁闄愭绾挎х粍鍚堟潵琛ㄧず锛岄偅涔堣繖涓嚱鏁板氨鏄闃惰穬鍑芥暟銆傞樁璺冨嚱鏁版槸鏈夐檺娈靛垎娈靛父鏁板嚱鏁扮殑缁勫悎銆傞樁璺冨嚱鏁版槸濂囧紓鍑芥暟锛宼 < 0鏃讹紝鍑芥暟鍊间负 0锛泃 = 0鏃讹紝鍑芥暟鍊间负1/2,锛泃 > 0鏃讹紝鍑芥暟鍊间负1锛屽彲浠ユ柟渚垮湴琛ㄧず鏌愪簺淇″彿锛鐢ㄩ樁璺冨嚱鏁拌〃绀轰俊鍙风殑...
绛旓細瑙佸浘鐗囥
