aptitude 命令_C-命令行参数Aptitude问题与解答

aptitude 命令

C programming Command Line Arguments Aptitude Questions and Answers: In this section you will find C Aptitude Questions and Answers on Command Line Arguments – Passing values with running programs, separate argument values, number of arguments etc.

C编程命令行参数能力问题和解答：在本节中，您将找到命令行参数的C能力问题和解答-通过运行程序传递值，单独的参数值，参数数目等。

1) What will be the output of this program (prg_1.c)? If input command is
C:\TC\BIN>prg_1 includehelp.com C C++ Java

#include <stdio.h>
int main(int argc,char* argv[])
{
printf("%d",argc);
return 0;
}

Answer

Correct Answer - 2
5
The first argument of main argc contains the total number of arguments given by command prompt including command name, in this command total arguments are 5.

1)该程序(prg_1.c)的输出是什么？ 如果输入命令是
C：\ TC \ BIN> prg_1 includehelp.com C C ++ Java

回答

正确答案-2
5
main argc的第一个参数包含命令提示符给出的参数总数，包括命令名称，在此命令中，参数总数为5。

2) What will be the output of this program (prg_2.c)? If input command is
C:\TC\BIN>prg_2 1,2 "Ok" "Hii" Hello , AAA

#include <stdio.h>
int main(int counter,char** arg)
{
unsigned char tally;
for(tally=0;tally< counter; tally+=1)
printf("%s|",arg[tally]);
return 0;
}

C:\TC\BIN\PRG_2.EXE|1,2|Ok|Hii|Hello|,|AAA|
ERROR: Invalid argument list.
C:\TC\BIN\PRG_2.EXE|1|,|2|Ok|Hii|Hello|,|AAA|
1,2|Ok|Hii|Hello|,|AAA|

Answer

Correct Answer - 1
C:\TC\BIN\PRG_2.EXE|1,2|Ok|Hii|Hello|,|AAA|

2)该程序(prg_2.c)的输出是什么？ 如果输入命令是
C：\ TC \ BIN> prg_2 1,2“确定”“ Hii”您好，AAA

C：\ TC \ BIN \ PRG_2.EXE | 1,2 |确定| Hii |你好|，| AAA |
错误：无效的参数列表。
C：\ TC \ BIN \ PRG_2.EXE | 1 |，| 2 | OK | Hii | Hello |，| AAA |
1,2 |确定| Hii |你好|，| AAA |

回答

正确答案-1
C：\ TC \ BIN \ PRG_2.EXE | 1,2 |确定| Hii |你好|，| AAA |

3) Which is the correct form to declare main with command line arguments ?
You can choose more than answers.

int main(int argc, char argv[]){ }
int main(int argc, char* argv[]){ }
int main(int argc, char** argv){ }
int main(int* argc, char* argv[]){ }

Answer

Correct Answer - 2 and 3
int main(int argc, char* argv[]){ } and int main(int argc, char** argv){ }

3)用命令行参数声明main的正确格式是什么？
您可以选择多个答案。

int main(int argc，char argv []){}
int main(int argc，char * argv []){}
int main(int argc，char ** argv){}
int main(int * argc，char * argv []){}

回答

正确答案-2和3
int main(int argc，char * argv []){}和int main(int argc，char ** argv){}

4) What will be the output of this program (prg_2.c)? If input command is
C:\TC\BIN>prg_2 Include Help .Com

#include <stdio.h>
int main(int argc,char** arg)
{
printf("%s",arg[argc]);
return 0;
}

(null)
.Com
Help
C:\TC\BIN>prg_2.exe

Answer

Correct Answer - 1
(null)
argc contains the total number of arguments passed through command prompt, in this program value of argc will be 3, and the given arguments will store into arg[] from 0 to 2 index.
So arg[argc] => arg[3] will return null.

4)该程序(prg_2.c)的输出是什么？ 如果输入命令是
C：\ TC \ BIN> prg_2包括帮助.Com

(空值)
.Com
救命
C：\ TC \ BIN> prg_2.exe

回答

正确答案-1
(空值)
argc包含通过命令提示符传递的参数总数，在此程序中argc的值为3，并且给定参数将从0到2索引存储到arg []中 。
因此arg [argc] => arg [3]将返回null。

5) What will be the output of this program (prg_2.c)? If input command is
C:\TC\BIN>prg_3 10 20 30

#include <stdio.h>
#include <stdlib.h>
int main(int argc,char* argv[])
{
int answer;
answer=atoi(argv[1])+atoi(argv[2]);
printf("%d",answer);
return 0;
}

Answer

Correct Answer - 4
30
1^st, 2^nd argument of argv are 10 and 20.

5)该程序(prg_2.c)的输出是什么？ 如果输入命令是
C：\ TC \ BIN> prg_3 10 20 30

回答

正确答案-4
30
argv的^1st ， ^2nd参数是10和20。