[問題] 陣列宣告

看板C_and_CPP (C/C++)作者alohaiscool (aloha)時間16年前 (2009/09/15 14:08)推噓3(3推 0噓 5→)

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小弟我是程式初心者，最近在寫monte carlo的程式這程式主要是要把吸收的比重存到陣列裡頭 #include <iostream> using std::cout; #include <iomanip> using std::setw; #include <ctime> #include <cstdlib> #include <math.h> 這是我自己define的標頭檔 #include "main.h" #include "define.h" int main() { srand(time(NULL)); photon m6; double R_sp; bool tissue_flag; R_sp=((n1-n2)*(n1-n2))/((n1+n2)*(n1+n2)); m6.WA=0;m6.WR=0;m6.WT=0; m6.WR=m6.WR+photon_number*R_sp; int gridSize_t=thickness/dz; int gridSize_w=width/dr; double out_bound=0; 這四項出現了錯誤訊號 variable-sized object `xxxx' may not be initialized double absorption[gridSize_t][gridSize_w]={0}; double volume[gridSize_w]={0}; double Source[gridSize_t][gridSize_w]={0}; double fluence[gridSize_t][gridSize_w]={0}; for (int p=0;p<photon_number;p++) { m6.x=0;m6.y=0;m6.z=0; m6.ux=0;m6.uy=0;m6.uz=1; m6.weight=1-R_sp; m6.flag=true; while (m6.flag) { move(&m6); if(m6.z<0) { tissue_flag=false; test_in_tissue(tissue_flag,&m6); } else if(m6.z>thickness) { tissue_flag=true; test_in_tissue(tissue_flag,&m6); } if((m6.z>=0)&&(m6.z<=thickness)) { m6.WA=m6.WA+m6.weight*(ma/(ma+ms)); 其實我很想把下面這一塊寫成一個cpp檔讓我連結進來這樣程式才不會落落長 double r =sqrt((m6.x)*(m6.x)+(m6.y)*(m6.y)); unsigned int i=r/dr; i++; unsigned int j=m6.z/dz; j++; if (r>width) { out_bound=out_bound+m6.weight*(ma/(ma+ms));} else { absorption[j][i]=absorption[j][i]+m6.weight*(ma/(ma+ms)); volume[i]=(2*i+1)*pi*dr*dr*dz; Source[j][i]=absorption[j][i]/(photon_number*volume[i]); fluence[j][i]=Source[j][i]/ma; } 以上各位高手如果要把它拉出來當個副函式要怎麼寫呢？ m6.weight = m6.weight*(ms/(ma+ms)); if(m6.weight<w_th) {roulette(&m6);} else {direction(&m6);} } } } system("pause"); } 跪謝了～因為程式功力很差看的很吐血請見諒 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.174.168 ※ 編輯: alohaiscool 來自: 140.112.174.168 (09/15 14:13)