Find the first occurrence of a character in a string using C?

Question

Write the prototype function in C: char * my_strchr (char * arr, char c);

The function should return the cursor to the first occurrence of the forwarded character in the character sequence or NULL if the forwarded character was not found.

i came up with solution also but it has to be string :

char *my_strchr(char *arr,char c)
{
int i=0;
char *p;
while(1)
{
if(i[arr] == c){p = i[arr];return p;break;}
if(i[arr] == '\0'){p= NULL;return p;break;}
i++;
}}

Answer 1

Just traverse the array and compare the each element with the target character, rest is simple.
Following is the sample code...

char * my_strchr(char * arr, char c)
{
    int i, len;

    len = strlen(arr);

    for(i=0; i<len; i++)
    {
        if(arr[i] == c)
        {
            return &arr[i];
        }
    }

    return null;
}