将一个字符串复制到另一个字符串

Question

I am following this algorithm that will copy one string to another string:

[S is a source string and T is a target string]
1. Set I = 0
2. Repeat step 3 while S[I] ≠ Null do
3. T[I] = S[I]
4. I = I + 1
[End of loop]
5. Set T[I] = Null
6. Return

I have attempted it but it instead removes the first n characters from source string relative to length of target string. For example:

#include <stdio.h>
#include <stdlib.h>

char const* stringCopy(char* T, char const* S){
    while(*S){
        *T++ = *S++;
    }
    //*T = 0;
    return T;
}

int main(void){
    char sentence[100] = "some sentence";
    char* again = "another";

    printf("%s", stringCopy(sentence, again));
    return EXIT_SUCCESS;
}

Answer 1

You return the incremented original pointer T. Make a copy of T for the copy loop and return the original pointer.

#include <stdio.h>
#include <stdlib.h>

char const* stringCopy(char* T, char const* S){
    char *ptr = T;

    while(*ptr++ = *S++);

    return T;
}

int main(void){
    char sentence[100] = "some sentence";
    char* again = "another";

    printf("%s", stringCopy(sentence, again));
    return EXIT_SUCCESS;
}