email verifiction

Question

whats missing.........?
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
int valid_mail(char x[]);
int main()
{
do{
char mail[100];
gets(mail);
}while(valid_mail(mail)==-1);
return 0;
}
int valid_mail(char x[])
{
int count=0;
int countp=0;
int i,j;
int t,t2;
int k=0;
for(i=0 ; i<strlen(x) ; i++)
{
if(x[i]=='@')
{
count++;
t=i;
}
}
if(count==1)
{
for(j=0; j<t ; j++)
{
if(!(x[j]=='_' || x[j]=='.' || isalpha(x[j]) || isdigit(x[j])))
{
k=-1;
printf("\nInvalid e-mail\n");
break;
}
}
if(k==0)
{
for(i=0; i>t ; i++)
{
if(x[i]=='.')
{
t2=i;
countp++;
}
}
if(countp==1)
{
for(i=0; i<t2 && i>t2; i++)
{
if(!(isalpha(x[i])))
{
k=-1;
printf("\nInvalid e-mail\n");
break;
}
else
{
k=1;
}
}
if(k==1)
{
if(x[t2+3]!='\0')
{
k=-1;
printf("\nInvalid e-mail\n");
}
}
}
else
{
k=-1;
printf("\nInvalid e-mail\n");
}
}
}
else
{
k=-1;
printf("\nInvalid e-mail\n");
}
return k;
}

Answer 1

Try using a regex :)