Answer / ravikiran p sattigeri

/* str_cmp : Comapares the character strings s1 and s2, and
returns negative, zero or positive if s1 is
lexicographically less than, equal to, or greater than s2.
The value is obtained by subtracting the characters at the
first position where s1 and s2 disagree */

/* return < 0 if s1<s2, 0 if s1==s2, >0 if s1>s2 */
int str_cmp (char *s1, char *s2)
{
while(*s1++ == *s2++) {
if (*s1 == '\0')
return 0;
}
return *S1 - *s2;
}

Answer / geetha

main()
{
char a[10],b[10];
int i,l2,l1;
printf("Enter two strings");
scanf("%s\n",a);
scanf("%s",b);
l1=strlen(a);
l2=strlen(b);
if(l1==l2)
{
for(i=0;i<l1;i++)
{
if(a[i]==b[i])
continue;
else
printf("no match");
break;
}
}
else
printf("no match");
if(i==11)
printf("both strings are same");
}

Answer / vignesh1988i

sorry ... i made a small logical problem in a above posted
answer ... so this program will work out correctly.....

#include<stdio.h>
#include<conio.h>
int xstrcmp(char*,char*);
void main()
{
int c;
char a1[20],a2[20];
printf("enter the two strings :");
gets(a1);
gets(a2);
c=xstrcmp(&a1[0],&a2[0]);
printf("%d",c);
getch();
}
int xstrcmp(char *a,char *a1)
{
if((*a)!=(*a1))
return((*a)-(*a1));
else if((*a)!='\0' || (*a1)!='\0')
{
(a)++;
(a1)++;
xstrcmp(a,a1);
}
else
return 0;
}

Answer / vignesh1988i

#include<stdio.h>
#include<conio.h>
int xstrcmp(char*,char*);
void main()
{
int c;
char a1[20],a2[20];
printf("enter the two strings :");
gets(a1);
gets(a2);
c=xstrcmp(&a1[0],&a2[0]);
printf("%d",c);
getch();
}
int xstrcmp(char *a,char *a1)
{
if((*a)!=(*a1))
return((*a)-(*a1));
else if((*a)!='\0' && (*a1)!='\0')
{
(*a)++;
(*a1)++;
xstrcmp(a,a1);
}
else
return 0;
}

Answer / sasikumar

main()
{
char s1[10],s2[10];
printf("enter two strings:");
scanf("%s%s",&s1[10],&s2[10]);
compare(s1[10],s2[10]);
getch();
}
compare(char st1[10],char st2[10])
{
int l1,l2,i;
l1=strlen(st1[10]);
l2=strlen(str2[10]);

if(l1==l2)
{
for(i=0;i<l1;i++)
{
if(st1[i]==st2[i])
{
if(i==l1)
{
printf("two strings are equal");
}

}
else
goto label:
}
}
else
goto label:
label:printf("not equal");
}

Answer / mallesh

#include<stdio.h>
#include<conio.h>
int xstrcmp(char*,char*);
void main()
{
int c;
char a1[20],a2[20];
printf("Enter the two string's :\n");
gets(a1);
gets(a2);
c=xstrcmp(&a1[0],&a2[0]);
printf("%d",c);
getch();
}
int xstrcmp(char *a,char *a1)
{

while((*a)==(*a1))
{
if((*a=='\0')||(*a1=='\0'))
break;
++(a);
++(a1);
}
return((*a)-(*a1));
}

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