Slip 5 - B) Write a program which accepts a sentence from the user and alters it as follows: Every space is replaced by *, case of all alphabets is reversed, digits are replaced by ?

Solution:

# include<stdio.h>

  /* Function to get sum of digits */

int main()

{

  int c = 0;

   char ch, s[100];

    printf("Input a string\n");

   gets(s);

    for(c=0;s[c] != '\0';c++) {

      ch = s[c];

      if (ch >= 'A' && ch <= 'Z')

         s[c] = s[c] + 32;

      else if (ch >= 'a' && ch <= 'z')

         s[c] = s[c] - 32;

      else if(s[c]==' ')

         s[c] = '*';

      else if(s[c]>0 || s[c]<9) 

         s[c] = '?';

         }

    puts(s);

     return 0;

}