Searching a simple text pattern in the command line arguments program example

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional library: none/default

Additional project setting: Set project to be compiled as C

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C Code (/TC)

Other info: Run at command prompt

To do: Searching a simple text pattern in the command line arguments program example

To show: How to create a console C program which accept the command line arguments

 

 

// searchpattern.cpp, working program

#include <stdio.h>

#include <string.h>

 

#define MAXLINE 100

 

int getline(char *line, int max)

{

int count, i;

i=0;

 

while(--max > 0 && (count=getchar()) != EOF && count != '\n')

line[i++] = count;

 

if(count=='\n')

line[i++] = count;

 

line[i]='\0';

return i;

}

// find and print lines that match the

// pattern from the 1st argument

main(int argc, char *argv[])

{

char line[MAXLINE];

int found = 0;

// If just program name (argc = 1), then...

if(argc != 2)

printf("Usage: searchpattern thepattern\n");

// If the program name with switch/option (argc = 2), then...

else

while(getline(line, MAXLINE) > 0)

{

if(strstr(line, argv[1]) != NULL)

{

printf("%s", line);

found++;

}

}

return found;

}

 

Output example:

(This program run at the command prompt)

 

F:\vc2005project\searchpattern\debug>searchpattern

Usage: searchpattern thepattern

 

F:\vc2005project\searchpattern\debug>searchpattern somepattern

Test the somepattern word

Test the somepattern word

No 'somepattern' here?

No 'somepattern' here?

If there are somepattern word, it will print it out

If there are somepattern word, it will print it out

else, the program just ignore your input like this line

Can you see the somepattern word printed?

Can you see the somepattern word printed?

^Z

F:\vc2005project\searchpattern\debug>

 

 

C and C++ Programming Resources | C & C++ Code Example Index