我无法弄清楚strcpy(I can't figure out strcpy)

 这是一个未完成的代码，用于将字母数字字符转换为摩尔斯电码。 到目前为止，只有字符“A”在集合中。 我似乎无法将摩尔代码字符串“a”复制到变量“c”中。 编译器告诉我，传递strcpy参数1使得指针来自整数而没有强制转换。 
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>

int main(){
    char c; /* variable to hold character input by user */
    char sentence[ 80 ]; /* create char array */
    int i = 0; /* initialize counter i */
    const char *a = ".- ";

    /* prompt user to enter line of text */
    puts( "Enter a line of text:" );

    /* use getchar to read each character */
    while ( ( c = getchar() ) != '\n') {
        c = toupper(c);
        switch (c){
            case 'A':
                strcpy(c, a);
                break
            }
        sentence[ i++ ] = c;
    } /* end while */

    sentence[ i ] = '\0'; /* terminate string */

    /* use puts to display sentence */
    puts( "\nThe line entered was:" );
    puts( sentence );
    return 0;
}

This is an unfinished code for converting alphanumeric characters into Morse code. So far only the character "A" is in set. I can't seem to copy the Morse code string of "a" into the variable "c". The compiler tells me that passing argument 1 of strcpy makes pointer from integer without a cast.
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>

int main(){
    char c; /* variable to hold character input by user */
    char sentence[ 80 ]; /* create char array */
    int i = 0; /* initialize counter i */
    const char *a = ".- ";

    /* prompt user to enter line of text */
    puts( "Enter a line of text:" );

    /* use getchar to read each character */
    while ( ( c = getchar() ) != '\n') {
        c = toupper(c);
        switch (c){
            case 'A':
                strcpy(c, a);
                break
            }
        sentence[ i++ ] = c;
    } /* end while */

    sentence[ i ] = '\0'; /* terminate string */

    /* use puts to display sentence */
    puts( "\nThe line entered was:" );
    puts( sentence );
    return 0;
}

原文：https://stackoverflow.com/questions/28075877