CODEWITHSUNDEEP
c
Aspis
Aspis

Reputation: 55

Input with spaces, shifting letters

I want to know how ro get input as is.

For example: 

input: 1
       ab c

I want that the output will be:

       bc d

Code

  char x;
  int shift;
  printf("Please enter shift number:");
  scanf("%d",&shift);
  printf("Please enter text to encrypt:\n");
    while (scanf(" %c",&x)!=EOF)
    {
        if(x<='z' && x>='a')
        {
          x=(x-'a'+shift)%(NUM_LETTERS)+'a';
            printf("%c",x);
            continue;
        }
        if(x<='Z' && x>='A')
        {
          x=(x-'A'+shift)%(NUM_LETTERS)+'A';
            printf("%c",x);
            continue;
        }
        else{
          printf("%c",x);
        }
    }
  return 0;
}

Is there a possibility that the user will type letters while passing a line until he clicks on CTR-z?

Upvotes: 1

Views: 139

Answers (2)

chux
chux

Reputation: 154280

Changes needed

Read a line for shift

In preparation for the later while() loop, all of the shift input line needs consumption.

scanf("%d",&shift);
// add 2 lines to consume the rest of the line of input
// such as trailing spaces and \n
int ch;
while ((ch = getchar()) != '\n' && ch != EOF);

Read, but do not skip white-space

The " " in " %c" consumes without saving leading white-space.

// while (scanf(" %c",&x)!=EOF)
while (scanf("%c",&x)!=EOF)   // drop space from format

Style suggestion:
Rather than test for inequality of an undesired return value, test for equality of a desire return value.

// while (scanf("%c",&x) != EOF)
while (scanf("%c",&x) == 1)

Upvotes: 1

alexzok
alexzok

Reputation: 91

Actually yes, it's possible. But here is a trick which you should notice: scanf - returns number of actually read values. But you need to check whether the input was ended. For that use getchar function, for example, in your main loop.

Upvotes: 2

Related Questions