[問題] 程式碼疑問??

看板C_and_CPP (C/C++)作者klimkid (育)時間13年前 (2012/07/18 16:28)推噓0(0推 0噓 4→)

留言4則, 2人參與討論串1/1

// stl.cpp : Defines the entry point for the console application. // // #include "stdafx.h" #include <stdlib.h> #include <string.h> #include <stdio.h> #include <algorithm> #include <vector> #include <math.h> int main(int argc,int *argv[]) { FILE *input,*output,*tempfile; char filename[260],instr[10000]; unsigned long int N,totalN,gsize,skipN; double a,b, c, x,total,avg, avg2, skip, total2, time; printf("infile : "); scanf("%s",filename); input=fopen(filename,"r"); printf("outfile : "); scanf("%s",filename); output=fopen(filename,"w"); printf("group size : "); scanf("%lu",&gsize); printf("skip valut : "); scanf("%lf",&skip); * printf("time : "); * scanf("%lf",&time); fgets(instr,9999,input); fgets(instr,9999,input); do { * totalN=0; total=0.0; total2=0.0; skipN=0; if (fgets(instr,9999,input)==NULL) break; if (instr[0]!='Z') break; tempfile=fopen("tempfile.tmp","w"); for(unsigned long int i=0;i<gsize;i++) { if (i) fgets(instr,9999,input); instr[strlen(instr)-1]=0; fprintf(output,"%s ",instr+7); fgets(instr,9999,input); sscanf(instr+3,"%lu",&N); fprintf(output,"%6lu\n",N); fgets(instr,9999,input); fgets(instr,9999,input); totalN+=N; for(unsigned long int j=0;j<N;j++) { fgets(instr,9999,input); sscanf(instr,"%lf",&x); if (x>=skip) skipN++; else total+=x; fprintf(tempfile,"%20.15lf\n",x); } } fclose(tempfile); total = total*(double)time; total2 = total2 * (double)time*(double)time; avg=total/(double)(totalN-skipN); tempfile=fopen("tempfile.tmp","r"); total=0.0; total2=0.0; while(fscanf(tempfile,"%lf",&a)==1) total+=((a*time-avg)*(a*time-avg)); total2+=(a*a); b=sqrt(total/(double)(totalN-skipN)); c=(sqrt(total2/(double)(totalN-skipN)))*time; fclose(tempfile); fprintf(output,"%10d %10d %20.15lf %20.15lf %20.15lf\n",totalN,skipN,avg,b, c); } while(1); fclose(output); ------------------------------------------------------------------------------ 這個程式碼是用來分析商用軟體跑出來的data,data裡面存放的速度值在這個程式碼裡我希望將讀入檔案的數值作坊均跟值的計算,變數time都設為1 變數c得到的是速度的方均根值,skip value 是一門檻值(我希望將data檔裏面大於理想值的部分去除掉),但是在計算C值時我發現在我邏輯裡面應該被去除掉的值也被計算進去了想請問各為C++前輩,是否在以下這一段有錯誤呢?? for(unsigned long int j=0;j<N;j++) { fgets(instr,9999,input); sscanf(instr,"%lf",&x); if (x>=skip) skipN++; else total+=x; fprintf(tempfile,"%20.15lf\n",x); } -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.112.38.128