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pointers_string.c
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pointers_string.c
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#include <stdio.h>
int strlen_impl(char *str)
{
int i = 0;
while(*str != '\0')
{
i++;
str++;
}
return i;
}
void strcat_impl(char *str1, char *str2)
{
char arr[40];
char *ptr = arr;
while(*str1 != '\0')
{
*ptr++ = *str1++;
}
while(*str2 != '\0')
{
*ptr++ = *str2++;
}
*ptr = '\0';
printf("concatenated string is %s\n", arr);
}
int strchr_impl(char *str, char c)
{
int i = 0;
int is_found = -1;
while(*str != '\0')
{
if(*str == c)
{
is_found = i;
break;
}
str++;
i++;
}
return is_found;
}
char *strdup_impl(char *str)
{
char arr[100];
char *arr_ptr = arr;
while(*str!='\0')
{
*arr_ptr++ = *str++;
}
*arr_ptr = '\0';
return arr;
}
int main(int argc, char *argv[])
{
int len = strlen_impl("abc");
printf("Length of abc is %d\n", len);
len = strlen_impl("akshar");
printf("Length of akshar is %d\n", len);
len = strlen_impl("");
printf("Length of is %d\n", len);
strcat_impl("akshar", "raaj");
int found = strchr_impl("akshar", 's');
printf("Found at %d\n", found);
found = strchr_impl("akshar", 'b');
printf("Found at %d\n", found);
char *dupl = strdup_impl("akshar");
printf("Duplicated string %s\n", dupl);
return 0;
}