The function strcpy doesn't work

I had a homework saying that i should

create a program which takes a string and remove all successive repetitions in it.

i don't know why it doesn't work, this is my code :


int main()
    char ch[50];
    int i;
    for (i=0;i<strlen(ch)-1;i++);
        while (ch[i] == ch[i+1])
    return 0;


Remove the ; after for loop because it terminates the loop and is wrong.

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