int strlen(char* s)
{
int len=0;
while(1)
{
if(s[i]!='\0')
{
len++;
}
else
{
break;
}
}
return len;
}
int strcmp(char* s1, char* s2)//s1>s2,返回1.s1==s2,返回0.s1{
int len1=strlen(s1);
int len2=strlen(s2);
int i=0,j=0;
while(1)
{
if(s1[i]>s2[j]) return 1;
else if(s1[i] else if(s1[i]==s2[j] && s1[i+1]=='\0' && s2[j+1]=='\0')
return 0;
else if(s1[i]==s[j] && s1[i+1]=='\0' && s2[j+1]!='\0')
return -1;
else if(s1[i]==s[j] && s1[i+1]!='\0' && s2[j+1]=='\0')
return 1;
i++;
j++;
}
}
