- 4月 11 週五 201423:18
C語言學習筆記
- 11月 14 週三 201213:05
c++ 字串處理
printf,strcpy,strcat
字串長度的計算=字的個數+1 (for "\0", 判斷終點)
snprintf,printf
字串長度的計算=字的個數+1 (for "\0", 判斷終點)
snprintf,printf
- 6月 08 週五 201201:38
install GSL - GNU Scientific Library @ Fedora 15
sudo yum install gsl gsl-devel
// 注意 gsl : gives header; gsl-devel: gives sourse code ， 所以兩個都要裝！
// 注意 gsl : gives header; gsl-devel: gives sourse code ， 所以兩個都要裝！
- 5月 29 週二 201212:57
[紀錄] bus error
有時候用malloc()來給記憶體會出現bus error
改成calloc() 就沒問題了
more details
改成calloc() 就沒問題了
more details
- 9月 22 週四 201117:26
[c++] gcc options
OPTION in command line
ex: g++ -W test.c -o test
-W :Print extra warning messages
ex: g++ -W test.c -o test
-W :Print extra warning messages
- 9月 19 週一 201114:22
[c++] *,&,sizeof,malloc
/* How to use * and & */
int *b , a = 6, aa[a];// b is IP, a is value ,aa[a] is int array with size a
b = &a; //b=: the IP of a; '&a':IP of a. [*b=values, b=IP, a=values, &a=IP]
int *b , a = 6, aa[a];// b is IP, a is value ,aa[a] is int array with size a
b = &a; //b=: the IP of a; '&a':IP of a. [*b=values, b=IP, a=values, &a=IP]
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