Custom strncpy function in C

Here's a simple implementation of a custom desired length string copy function. This function copies a string into another upto a desired length.

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main()
{
    char *source;
    char *target;
    char *ret;
    int no_of_char;

    /*function prototype it takes string and returns address*/
    char *my_strncpy(char *target1,const char *source1,int no);
    source=(char*)malloc(20);
    target=(char*)malloc(20);

    printf("enter the string to be copied:\n");
    fgets(source,20,stdin);   //taking input from user
    
    printf("\nenter the number of characters to be copied:");
    scanf("%d",&no_of_char);
    ret=my_strncpy(target,source,no_of_char);   
    
    printf("\nThe address of copy of string is %d ",ret );  //print the address of copt of string
    printf("\nThe copied string is %s \n", ret);  //print the copy of string
    
    free(source);
    free(target);
    return EXIT_SUCCESS;
}
char * my_strncpy(char *target1,const char *source1,int no)
{
    char *tempt=target1;
    int n=0;
    while(n<no)
    {
        *target1=*source1;
        target1++;
        source1++;
        n++;
    }

    *target1='\0';
    return tempt;
}