string processing functions using pointers[C++]

   #include <iostream>

using namespace std;

int string_length(char *str)

{

    int length=0;

    while(*str!='\0')

    {

        length++;

        str++;

    }

    return length;

}

void string_copy(char *target,char *source)

{

    while(*source)

    {

        *target=*source;

        source++;

        target++;

    }

    *target='\0';

}

void string_concat(char *s1,char *s2)

{

    while(*s1!='\0')

    {

        s1++;

    }

    

 *s1++=' ';

        while(*s2!='\0')

        {

            *s1=*s2;

            s1++;

            s2++;

        }

    *s1='\0';

}

int main()

{

    char str[30]="Object Oriented Program";

    char source[20]="SRKR CSE";

    char target[20];

    char s1[20]="OOP";

    char s2[20]="C++";

    cout<<"length of string is: "<<string_length(str)<<endl;

    string_copy(target,source);

    cout<<"Copied string is: "<<target<<endl;

    string_concat(s1,s2);

    cout<<"Concatenated string is : "<<s1<<endl;

    return 0;

}

     

           

Note: Need to be arranged in compiler after copied

   

 OutPut:

length of string is:23
Copied string is: SRKR CSE
Concatenated string is:OOP C++