Write_A_Program_To_Read_Two_Strings_And_Perform_The_Following_Operations

 #include<stdio.h>
	#include<conio.h>
	int stringlength(char *s);
	int stringcompare(char *s1,char *s2,int ,int);
	void string_concatenate(char *s1,char *s2,int,int);
	void stringreverse(char *s,int);
	void main()
	{
		char str1[20],str2[30];
		int n,i,k,l1,l2;
		clrscr();
		printf("\n Enter the first string:");
		scanf("%s",str1);
		printf("\n Enter the second string: ");
		scanf("%s",str2);
		l1=stringlength(str1);
		printf("\n Length of first string is=%d",l1);
		l2=stringlength(str2);
		printf("\n Length of Second string is=%d",l2);
		k=stringcompare(str1,str2,l1,l2);
		if(k==1)
			printf("\n Two strings are equal\n");
		else
		{
			printf("\n Two strings are not equal");
			printf("\n After concatenating two strings, resultant string is:");
			string_concatenate(str1,str2,l1,l2);
		}
		printf("\n Reverse of first string is=");
		stringreverse(str1,l1);
		printf("\n Reverse of second string is=");
		stringreverse(str2,l2);
		getch();
	}
	
	int stringlength(char *str)
	{
		int k;
		for(k=0;str[k]!='\0';k++);
		return(k);
	}
	
	int stringcompare(char *s1,char *s2,int l1,int l2)
	{
		int i,t=0;
		if(l1==l2)
		{
			for(i=0;i<l1;i++)
				if(s1[i]!=s2[i])
					t=1;
			if(t==0)
				return(1);
			else
				return(0);
		}
		else
		    return(0);
	}

	void string_concatenate(char *s1,char *s2,int l1,int l2)
	{
		int i;
		char str[60];
		for(i=0;i<l1;i++)
		     str[i]=s1[i];
		str[l1]=' ';
		l1++;
		for(i=0;i<l2;i++)
		     str[l1+i]=s2[i];
		printf("%s",str);
	}

	void stringreverse(char *s,int l)
	{
	     int i;
	     for(i=l-1;i>=0;i--)
			printf("%c",s[i]);
	}