1. Argument Passing to main()

2. 2
Passing Arguments to main( )
 Passing Arguments to main( )
– Example: print the arguments of main()
C:> myprog a b c d
program name: myprog
argument 1: a
argument 2: b
argument 3: c
argument 4: d
C:>

3. 3
Passing Arguments to main( )
 Passing Arguments to main( )
– You can declare formal parameters to main so that it can
receive arguments from the command line
• argc : number of arguments from command line
• argv : string array of arguments value from command line
[Ex] int main(int argc, char *argv[])
[Ex] myprog c java pascal
argc = 4
argv[0] => “myprog”
argv[1] => “c”
argv[2] => “java”
argv[3] => “pascal”

4. 4
Passing Arguments to main( )
[Ex] #include <stdio.h>
int main (int argc, char *argv[]){
int count;
printf(“program name: %sn”, argv[0]);
if(argc > 1){
for( count=1; count < argc; count++ )
printf(“argument %d = %sn”, count, argv[count]);
}
else
puts(“No comand line arguments”);
return 0;
}
> a.out hi hello
a.out
argv[1] = hi
argv[2] = hello

5. 5
Passing Arguments to main( ) in goormIDE
 Move the cursor to Terminal window

6. 6
Passing Arguments to main( ) in goormIDE
 Type “cd bin” to change directory

7. 7
Passing Arguments to main( ) in goormIDE
 Type “./main” and arguments