Lower-Upper Case/Positive-Negative Integer

How to let C Program to recognize both lower and upper case input. Also Check if input is a positive integer, negative integer in C Programming Language ?

This C Program is to recognize both lower and upper case input. Also Check if input is a positive integer, negative integer in C Programming Language.

Output:

1. Your input is positive even digit
2. Your input is negative odd digit
3. Your input is upper case letter
4. Your input is lower case letter

Solution :

1. #include<stdio.h>
2. #include<string.h>
3. void main()
4. {
5.     char array[20];
6.     int i;
7.   for(i=0;i<5;i++){
8.     gets(array);
9.   if(strlen(array)==1){
10.   if(array[i]>=48 && array[i]<=57){
11.     if(array[i]%2==0)
12.      printf("Your input is positive even digit\n");
13.     else
14.      printf("Your input is negative odd digit\n");
15.   }
16.   if(array[i]>=65 && array[i]<=90)
17.     printf("Your input is upper case letter\n");
18.   else if(array[i]>=97 && array[i]<=122)
19.     printf("Your input is lowercase letter\n");
20.   }
21.   }
24. }

C Program to count number of sentences words and letters in a paragraph

How to write a C Program to count number of sentences words and letters in a paragraph in C Programming Language ?

This C Program to count number of sentences words and letters in a paragraph.

Solution:

1. #include<stdio.h>
2. main()
3. {
4.         char ch[150];
5.         int i,c=0,c1=0,c2=0;
6.         printf("Enter a Paragraph \n");
7.         gets(ch);
8.         for(i=0;ch[i]!='\0';i++)
9.         {
10.                 if(ch[i]=='.'||ch[i]=='!'||ch[i]=='?')
11.                 {       c++;
12.                         c1++;
13.                 }
14.                 else if(ch[i]==' '||ch[i]==',')
15.                         c1++;
16.                 else if(ch[i]>65&&ch[i]<123)
17.                         c2++;
18.         }
19.         printf("\nNumber of letters = %d \nNumber of words=%d ",c2,c1);
20.         printf("\nNumber of Sentences = %d\n",c);
21. }

C Program Anagrams

How to write a C Program Anagrams in C Programming Language ?

Considering a string will only contain lower-case alphabets. It can also be done for uppercase letters , digits , special characters etc.

Solution:

1. #include<stdio.h>
2. #include<stdbool.h>
3. #include<string.h>
4. bool isAnagram(char *str1,char *str2)
5. {
6.     int alphabetCount[26] = {0};
7.     int i = 0;
8.    
9.     if(strlen(str1) != strlen(str2))
10.         return false;
11.    
12.     for(i=0;str1[i]!='\0';++i)
13.     {
14.         ++alphabetCount[str1[i]-'a'];
15.         --alphabetCount[str2[i]-'a'];
16.     }
17.    
18.     for(i=0;i<26;++i)
19.     {
20.         if(alphabetCount[i])
21.             return false;
22.     }
23.    
24.     return true;
25. }
26.  
27. int main(void)
28. {
29.    char string1[1001],string2[1001];
30.    
31.    /*
32.      considering a string will only contain lower-case alphabets
33.     It can also be done for uppercase letters , digits , special characters etc.
34.     */
35.    
36.    gets(string1);
37.    gets(string2);
38.    
39.    if(isAnagram(string1,string2))
40.        printf("yes");
41.    else
42.        printf("no");
43.    
44.     return 0;
45. }

File Handling (console to file) in C Program

How to write a C Program Writing a character into a file,reading the character from the console and writing the next letter into the file in C Programming Language ?

Solution:
/* Writing a character into a file,reading the character from the console and writing the next letter into the file*/

#include<stdio.h>
#include<stdlib.h>

int main()
{

FILE *fp; //creates a file pointer
char ch;
int con;


fp=fopen("filehandling.txt","w+"); // creates a text file with label "filehandling" in write mode

if(fp==NULL)  //checks for the filename validity
{
printf("\nUnable to open the file\n");
exit(0);
}
printf("\nFile opened successfully\n");

printf("\nEnter the character as input\n");
scanf("%c",&ch);


putc(ch,fp);

fclose(fp);

fp=fopen("filehandling.txt","rwa+");

ch=getc(fp);


con=ch;
con++;
if(con>=97 && con<122)
{

fprintf(fp,"\nthe next char is %c\n",con);
}
else
{
fprintf(fp,"\nthe next char is a\n");
fclose(fp);

// open filehandling.txt file and check the input and output given...
}
}