Command-line arguments, C/C++ Programming

Assignment Help:

Command-line arguments are passed into programs using the arguments of main(). Here's a quick example, for a program called by typing

"progname file.txt 1 2.7":
#include
#include
using namespace std;
int main(int argc, char *argv[])
{
char *progname, *filename;
int value1;
float value2;
if (argc != 4) {
cerr << "usage: " << argv[0] << " file.txt int float" << endl;
exit(1);
}
progname = argv[0]; // argv[0] is the executable's name itself
filename = argv[1];
value1 = atoi(argv[2]); // convert C-string to int with atoi()
value2 = atof(argv[3]); // convert C-string to float with atof()
cout << progname << " " << filename << " " << value1 << " " << value2 <exit(0);
}


Related Discussions:- Command-line arguments

Explain binary logical bit-wise operators, Binary logical bit-wise operator...

Binary logical bit-wise operators  There are three logical bit-wise operators :                   &             and                 |              or

Array, If an array holds integer, each of which is four bytes long, how man...

If an array holds integer, each of which is four bytes long, how many bytes from the base location of the array is the location of the fifth element?

Computer programing, pls give me answer 01110-00110 in 2''s comlpiment in d...

pls give me answer 01110-00110 in 2''s comlpiment in detail

Can a copy constructor admit an object of the similar class , Can a copy co...

Can a copy constructor admit an object of the similar class as parameter, rather than reference of the object?

What is a hash function, What is a hash function? Hash function: This ...

What is a hash function? Hash function: This is the method from the set 'K' of keys into the set 'L' of memory addresses.   H: K → L These are used to verify the address

Discuss polymorphism in c++, Problem 1. Discuss polymorphism in c++. ...

Problem 1. Discuss polymorphism in c++. Explaining Polymorphism 2. Write a program in c++ to read a 3X2 matrix and find smallest number in that matrix. Writin

C program for diviser, C Program for DIVISER   void main() {  ...

C Program for DIVISER   void main() {           int result,number,min;           clrscr();           printf("ENTER THE NUMBER=");           flushall();

C program for change the case in title case, #include stdio.h> #include ...

#include stdio.h> #include conio.h> #include ctype.h> #include string.h>   void main() {           int i=0,j=0,length;           char a[30];           cl

ASCII, A string S is said to be "Super ASCII", if it contains the character...

A string S is said to be "Super ASCII", if it contains the character frequency equal to their ascii values. String will contain only lower case alphabets (''a''-''z'') and the asci

Write a c program to compute the factorial, Write a C program to compute th...

Write a C program to compute the factorial of  5 i.e. 1x2x3x4x5 etc Write a C program to calculate the output Y for a given value of X for the following formula.       Y=X 2

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd