char * strcat(char * str1, char * str2)
{
int l1 = strlen_2(str1);
int l2 = strlen_2(str2);
char * ret = malloc(l1+l2+1);
for(int i = 0; i < l1+l2; i++)
{
if(i < l1)
ret[i] = str1[i];
else
ret[i] = str2[i - l1];
}
ret[l1+l2] = '\0';
return ret;
}
bool strend(char s[], char t[])
{
bool check = false;
//int tempsize = strlen_2(s) - strlen_2(t);
for (int i = 0; i <(strlen_2(s) - strlen_2(t)); i++)
{
if (s[i + strlen_2(s) - strlen_2(t)] != t[i])
{
bool check = false;
return (check);
}
else
{
check = true;
}
}
return (check);
}
int contains(char * string1, char * string2)
{
int s1l = strlen_2(string1);
int s2l = strlen_2(string2);
if(s1l < s2l)
{
return 0;
}
for(int i = 0; i <= s1l - s2l; i++)
{
if(s1l - i < s2l)
break;
if(string1[i] == string2[0])
{
for(int j = 0; j < s2l; j++)
{
if(! string1[i + j] == string2[j])
break;
if(j == s2l -1)
return 1;
}
}
}
return 0;
}
char * strdup(char * source)
{
int len = strlen_2(source);
char * dest = malloc(sizeof(char) * (len + 1));
for(int i = 0; i < len; i++)
{
dest[i] = source[i];
}
dest[len] = '\0';
return dest;
}
int main() {
clock_t start, end;
int i = 0;
char s[1000001];
while (i < 1000000) {
s[i++] = 's';
}
s[i] = '\0';
start = clock();
strlen(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
start = clock();
strlen_1(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
start = clock();
strlen_2(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
start = clock();
strlen_3(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
start = clock();
strlen_4(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
start = clock();
strlen_5(s);
end = clock();
printf("%f\n", (end-start)/(double)CLOCKS_PER_SEC);
return 0;
}
