Exercise 8

Write a C program to concatenate two strings without using built in functions.

SOURCE CODE:

/*Program to concatenate two strings without using string library functions.*/

#include<stdio.h>

#include<conio.h>

void main()

{

 char str1[50],str2[20];

 int i,j,len=0;

 clrscr();

 printf("\nEnter String1:\n");

 gets(str1);

 printf("\nEnter String2:\n");

 gets(str2);

 for(i=0;str1[i]!='\0';i++)

  len++;

 for(j=0;str2[j]!='\0';j++,i++)

  str1[i]=str2[j];

 str1[i]='\0';

 printf("\nConcatenated string is:\n");

 puts(str1);

}

OUTPUT:

 

Write a C program to compare two strings without using built in functions.

SOURCE CODE:

/*Program to compare two strings.*/

#include<stdio.h>

#include<conio.h>

void main()

{

 char str1[30],str2[30];

 int i,flag=0;

 clrscr();

 printf("Enter String1:\n");

 gets(str1);

 printf("Enter String2:\n");

 gets(str2);

 for(i=0;str1[i]!='\0'&&str2[i]!='\0';i++)

 {

  if(str1[i]!=str2[i])

  {

   flag=1;

   break;

  }

 }

 if(flag==1)

  printf("Strings are not same.");

 else

  printf("String1 is same as String2.");

}

OUTPUT: