display + library problem

[Kashif]

hi

first i am using tc3 compiler
which gives error for cstdlib

second

i want display a eng multiplication
method

i have done every thing but

how can i shift one left or right each line like

123
11
---------
123
123
--------
1353

[Ancient Dragon]

>>first i am using tc3 compiler
That's mistake #1. Trash it and use something more modern, such as Dev-C++ from www.bloodshed.net

>>which gives error for cstdlib
your compiler is too ancient. See above

[Kashif]

thanx
but
i donot have info about its syntax(change)
isit same

[Lerner]

cstdlib is the up to date version of stdlib. The older C header files like stdlib and stdio have been replace with versions prefixing the older version with a c, so stdlib became cstdlib and stdio became cstdio.

If the compiler you are using won't accept cstdlib then try stdlib. But, given the quality of the free DevC++ IDE (and bundled compiler) and the (for now) free version of VC++ both available on line for the taking, you should give serious thought to changing your compiler unless you are required (for example your instructor/school/employer require you to use your current compiler. After all three posters all recommending the same thing should carry some degree of reliability that you are getting good advice!

[Ancient Dragon]

If you are trying to learn how to drive a car, would you start out by learning how to drive horse & buggy as people did 200 years ago? They why try to learn programming with a very very old and outdated compiler?

There are probably several ways to solve your problem. One way is to use printf() with the width specier. For example, printf("%5d", 12) will print the number 12 right-justified in a field of 5 characters -- it will be padded on the left with spaces. Replace the 5 with * and you can specify the with in the first paremter to printf. for example, printf("%*d", 5, 12);

You can use that little bit of information to format the lines like you want them. First determine the maximum width of the output -- say 123 * 11 == a 4 digit number.

printf("%*d\n",4,123);
printf("%*d\n",4,11);
printf("--------------\n");
printf('%*d\n",4,123);  // 123 * 1 = 123
printf('%*d\n",3,123);  // 123 * 1 = 123
printf("--------------\n");
printf("%d", 123 * 11);

Now, instead of hard-coding the numbers as I did above, you will want to replace the with program variables.

I know that can also be done with c++ cout, but I'm pretty lousy with that so I won't even try to show you. I prefer printf() for anything more than triviel output because to me printf() is easier to use.

[Kashif]

i have to submite it after day tomarrow
so i cant change right now
and in c++

i already made the code:

char val2[256];
long int val1,i,k,ndiv1,x=20,y=53;
long int final,ln[16],j;
cleardevice();
setbkcolor(BLUE);
cout<<"**********************************************************************"<<endl<<endl<<endl;
cout<<"English Multiplication Method"<<endl<<endl;
cout<<"**********************************************************************"<<endl<<endl<<endl;
cout<<"enter 1st Value"<<endl;
cin>>val1;
cout<<"enter 2nd Value"<<endl;
cin>>val2;
ndiv1=strlen(val2);
clrscr();


for (i=0; i<ndiv1; ++i)
{
k=val2[i]-48;
ln[i]=k*val1;
}
j=atoi(val2);
final=j*val1;
cleardevice();
cout<<"*****************************************************************************"<<endl<<endl<<endl;
cout<<"                  "<<val1<<endl;
cout<<"                  "<<val2<<endl;
printf("              ------------n");
for (i=0; i<ndiv1; ++i) printf("                %dn",ln[i],"b");
printf("n            ------------n");
cout<<"    Result       "<<final<<endl;
cout<<"*****************************************************************************"<<endl<<endl<<endl;
getch();

but the problem is to disply
like in

               1234
               111
               --------
               1234
                 1234
                   1234
                ---------

each
time it shift the line one space

[Kashif]

time shift one space
-1234
--1234
---1234

[Kashif]

i now istalled borland c++ 5.02
is it
ok
but it gives graphic.h
library error

[Kashif]

can i concate two integers
like
int a=12
int b=41
c=1241

[Ancient Dragon]

can i concate two integers
like
int a=12
int b=41
c=1241

int c = (a*100) + b;

as a general rule you would not want to do that because if a or b are large enough it will cause data overflow and provide the wrong answer. If you are certain the values are small enough then it would be ok.