的所有排列字符串我有以下代码生成字符
#include <iostream>
#include <string>
using namespace std;
string generate(){
for (char c1='A';c1<='Z';c1++){
for (char c2='A';c2 <='Z';c2++){
for (char c3='A';c3<='Z';c3++){
for (char c4='A';c4<='Z';c4++){
return (new string *)(c1) + (new string*)(c2)+(new string*)(c3)+(new string*)(c4);
}
}
}
}
}
int main(){
return 0;
}
我要生成的字符串,但这里是错误
1>------ Build started: Project: string_combinations, Configuration: Debug Win32 ------
1>Build started 9/11/2010 12:42:08 PM.
1>InitializeBuildStatus:
1> Touching "Debug\string_combinations.unsuccessfulbuild".
1>ClCompile:
1> string_combinations.cpp
1>c:\users\david\documents\visual studio 2010\projects\string_combinations\string_combinations\string_combinations.cpp(11): error C2064: term does not evaluate to a function taking 1 arguments
1>c:\users\david\documents\visual studio 2010\projects\string_combinations\string_combinations\string_combinations.cpp(11): error C2064: term does not evaluate to a function taking 1 arguments
1>c:\users\david\documents\visual studio 2010\projects\string_combinations\string_combinations\string_combinations.cpp(11): error C2064: term does not evaluate to a function taking 1 arguments
1>c:\users\david\documents\visual studio 2010\projects\string_combinations\string_combinations\string_combinations.cpp(11): error C2064: term does not evaluate to a function taking 1 arguments
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:00.82
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
请帮我感到困惑,为什么我不能直接从转换字符串通过此方法字符串(char)
请注意事实上有24! = 620448401733239439360000可能的排列,所以运行上述程序(存储每个排列的版本)将会以'内存不足'异常爆炸。运行在自己的risc上,而不是在一台控制着核反应器或类似的东西的计算机上运行! – 2010-09-11 11:09:07
原来的代码(我解释它)是写所有4个字符的字符串 - 只有26^4的可能性。 – DanJ 2010-09-11 12:18:30
-1:这是您在代码中使用的所有内容的滥用。 – rubenvb 2010-09-11 12:33:43