word by word reveres of a string

Programming tips

Specifer

Specifier is a typedef-name and a very sensitive in C programming. Using an incorrect specifier for the data type being read or written will generate a run time error.

Header file

Missing the inclusion of appropriate header file in c program will generate an error. Such a program may compile but the linker will given an error message as it will not be able to find the functions used in the program.

Test expression

The test expression done on exact statement. The good habit of using test expression on exact or fulfill statement. So do not use floating point numbers for checking for equality in the test expression.

" ; " after loop

Semoclone ( ; ) is one of the best sensitive symbols in programming. Placing a semicolon ( ; ) after the WHILE or FOR loop is not a syntax error. So it will not be reported by the compiler. However, it is considered to be a logical error as it change

Comment

Not putting // before the start of single statement comment is a compiler error. Not putting the */ after the termination of block comment is a compiler error.

String_ word by word reveres of a string


// AHF C PROGRAM SOLVING

//solving here 2_D   ARRAY 	programming problem

#include 
#include 
#define pf printf
#define MAX_SIZE 100 // Maximum string size for all

int main()
{

    char str[1000], rev[100];
    int length, i, index, word_start, word_end;

    //input data
    pf("Enter any string: ");
    gets(str);

    //taking length of the given string
    length= strlen(str);
    index = 0;     //initialing index variable

    // start checking of words from the end of string
    word_start = length - 1;
    word_end = length - 1;

    while(word_start > 0)
    {

        // If a word is found
        if(str[word_start] == ' ')
        {
            // add the word to the reverse string
            i = word_start + 1;

            while(i <= word_end)
            {
                rev[index] = str[i];

                i++;    //update second loop
                index++;    //update index value
            }

            rev[index++] = ' ';    //taking space after reveres of each word

            word_end = word_start - 1;
        }

        word_start--;   //update first while loop
    }

    // Finally add the last word
    for(i=0; i<=word_end; i++)
    {
        rev[index] = str[i];
        index++;
    }

    //end of reverse string
    rev[index] = '\0';

    pf("\nThe given string is: %s", str);
    pf("\nThe reverse word by word of the given string is: %s", rev);

    return 0;
}

OUTPUT:

Enter any string: Ahf c programming web site

The given string is: Ahf c programming web site.

The reverse word by word of the given string is: 

site web programming c Ahf