C program to Reverse String program using inbuilt functions

Write a c program to input a string from the user. Use appropriate built-in

string functions to find the length of the string, copy 1 string to another,

convert to uppercase, convert to lowercase, string comparison, string

comparison irrespective of case, comparison of n characters in 2 strings, string

concatenation, concatenation of ‘n’ of characters, reverse a string

#include<stdio .h="">

#include<conio .h="">

#include<string .h="">

void main()

{

 int l,comp,cmp;

 char str[10], s1[10], s2[10], cat[20];

 clrscr();

 printf("Enter 1st String : ");

 gets(str);

        l=strlen(str);

 printf("\nThe length of the String : %d",l);

      strupr(str);

 printf("\nIn UPPERCASE : %s",str);

 strlwr(str);

 printf("\nIn lowercase : %s",str);

 strrev(str);

 printf("\nIn Reverse : %s",str);

 printf("\n\nEnter two strings : ");

 scanf("%s %s",&amp;s1,&amp;s2);

 cmp=strcmp(s1,s2);

 if(cmp==0)

 printf("\nStrings are equal");

  else

 printf("\nStrings are not equal");

 strcat(s1,s2);

 printf("\n\nString Concatenation : %s",s1);

 strcpy(s1,s2);

 printf("\nString2 copied into String1 : %s",s1);

 getch();

}

/*Output

Enter 1st String : yahoo

The length of the String : 5

In UPPERCASE : YAHOO

In lowercase : yahoo

In Reverse : oohay

Enter two strings : yahoo

yahoo

Strings are equal

String Concatenation : yahooyahoo

String2 copied into String1 : yahoo

*/</string></conio></stdio>