Comparing two strings using pointers

How to write Program for comparing two strings using pointers*/

//function for comparing two strings

int pstrcmp(const char *str1,const char *str2)

{

while(*str1!='\0'&&*str2!='\0'&&*str1==*str2)

{

str1++;

str2++;

}

//value returned when strings are of equal length

if(*str1==*str2)

return 0;

else

//value returned when strings are not of equal length

return(*str1-*str2);

}

//main function

main()

{

char str1[100],str2[100];

int n;

clrscr();

//accept two strings from user

printf("Enter some string:");

gets(str1);

printf("Enter second string:");

gets(str2);

//store the value returned by pstrcmp function in n

n=pstrcmp(str1,str2);

//decide which string is greater depending upon its value of n

if(n>0)

printf("First string is greater");

else if(n<0)

printf("Second string is greater");

else

printf("Both the strings are equal");

getch();

}

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