Recently began to learn C language, see a problem with the book today, made up a, plus or minus an integer can be normal output, but I still want to ask, if the terminal input is a floating point number, how to deal with? How to reverse the normal output?
The code is as follows:

/* from the terminal access to a number, according to the English reverse output */
#include  
#include  

Int main (void) 
{
Int inum renum; 
Bool nsign=true; 

Printf (" both Please input a Number: \ n "); 
The scanf (" % I ", & amp; Inum); 
If (inum<0) 
{
Printf (" - "); 
Inum=0 -inum; 
} 
Do {
If (inum/10!=0) 
{
Renum=inum % 10; 
Inum=inum/10; 
} 
The else 
{
Renum=inum; 
Nsign=false; 
} 
The switch (renum) 
{
Case 0: 
Printf (" zero "); 
break; 
Case 1: 
Printf (" one "); 
break; 
Case 2: 
Printf (" two "); 
break; 
Case 3: 
Printf (" three "); 
break; 
Case 4: 
Printf (" foru "); 
break; 
Case 5: 
Printf (" five "); 
break; 
Case 6: 
Printf (" six "); 
break; 
Case 7: 
Printf (" seven "); 
break; 
Case 8: 
Printf (" eight "); 
break; 
Case 9: 
Printf (" nine "); 
break; 
} 
} while (nsign); 
Printf (" \ n \ b "); 
return 0; 
} 

CodePudding user response:

The first can't use % floating point calculation
Second floating point Numbers are not accurate said a number

Opportunistic method
Char arr [80].
Sprintf (arr, "% 2" lf, 4.6);
Then take the arr

CodePudding user response:

reference 1/f, the truth is more important than right or wrong response:

1
can't use % floating point calculationSecond floating point Numbers are not accurate said a number

Opportunistic method
Char arr [80].
Sprintf (arr, "% 2" lf, 4.6);
Then the arr invert

Well, super classes,,, I began to see an , I am familiar with test in two days,
By the way, the nerve to ask a thing, by the way, just try the conditional expression:

 inum/10!=0? (renum=inum % 10, inum=inum/10) : (renum=inum, nsign=false); 
/* if (inum/10!=0) 
{
Renum=inum % 10; 
Inum=inum/10; 
} 
The else 
{
Renum=inum; 
Nsign=false; 
} */

Implementation effect is the same, the first look at beautiful view, ask a very super class question for me, for C language, conditional expressions which more efficiency better and IF statements?

CodePudding user response:

reference 1/f, the truth is more important than right or wrong response:

1
can't use % floating point calculationSecond floating point Numbers are not accurate said a number

Opportunistic method
Char arr [80].
Sprintf (arr, "% 2" lf, 4.6);
Then the arr invert

By the way, I want to express clearly or I didn't,
Such as a terminal input a floating point number 123.456, how to output into six five foru three two one;

CodePudding user response:

You need to put the
Inum is defined as a float or double!
Lf the scanf (" % ", & amp; Inum);