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這個問題要給會的人來給答案
Posted on 二月 7th, 2010 1 comment～以亂數產生20天的氣溫資料(範圍從15℃~36℃)，並且計算連續5天的平均溫度。其結果(資料檔)以檔案儲存！
其中裡面似乎是不能做出平均的數值或者有其他問題而不能執行
麻煩會的可以給一下詳細的解答ㄛ～謝囉！/* Fig. 5.9: fig05_09.c
Randomizing die-rolling program */
#include <stdlib.h>
#include <stdio.h>
#include <time.h>/* function main begins program execution */
int main()
{
srand(time(NULL));
int i; /* counter */
unsigned seed; /* number used to seed random number generator */seed; /* random number generator */
/* loop 10 times */
for ( i = 1; i <= 10; i++ ) {/* pick a random number from 1 to 6 and output it */
printf( "%10d", rand() % 22 + 15 );/* if counter is divisible by 5, begin a new line of output */
if ( i % 5 == 0 ) {
printf( "\n" );
} /* end if */} /* end for */
system("pause");
return 0; /* indicates successful termination */} /* end main */
/**************************************************************************
* (C) Copyright 1992-2004 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/1 responses to “這個問題要給會的人來給答案”
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>int main()
{
srand(time(NULL));
int sum=0;
char szTmp[100],szSave[256];
strcpy(szTmp,"");// initial
strcpy(szSave,"");// initialFILE *fw=fopen("C:\\apple.txt","w");// Create a stream. Save to "C:\apple.txt"
for(int i = 1; i <= 20; i++ )
{
int temp;
printf("%10d", temp= rand() % 22 + 15 );// Show temperature
sprintf(szTmp,"%10d",temp);
strcat(szSave,szTmp);// Save temperature to szSave
sum+=temp;if ( i % 5 == 0 )
{
sum = sum / 5;// average value
printf( "\taverage = %d \n" , sum );// Show average temperature
sprintf(szTmp,"\taverage = %d \n" , sum);
strcat(szSave,szTmp);// Save average temperature to szSave
sum=0;// Clear sum
}}
fputs(szSave,fw);// Write content to a stream.
fclose(fw);// Closes a streamsystem("pause");
return 0;
}註︰
1.資料檔以txt形式存在C:\apple.txt (可自行更改路徑，不過目錄要
存在，斜線 \ 要改成雙斜線 \\。 e.g. "D:\\XXX\\XXX.txt
2.有加註解，應該不難理解
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IVORY 二月 7th, 2010 at 04:26