为什么输出不出来啊！震惊🤯

Question

//将source.txt文本文件中的内容复制到dest.txt文本文件中,再将dest.txt文件中的内容读出显示到屏幕。
#include<stdio.h>
#include<stdlib.h>
int main()
{
FILE *ph,*pf;
char ch[100],source[100],dest[100];
gets(source);
gets(dest);
if((ph=fopen(source,"r"))==NULL)
{
printf("Cannot open");
exit(1);
}
if((pf=fopen(dest,"w"))==NULL)
{
printf("Cannot creat");
exit(1);
}
while(fgets(ch,100,ph)!=NULL)
fputs(ch,pf);
fclose(ph);
fclose(pf);
return 0;
}

Answer 1

//将source.txt文本文件中的内容复制到dest.txt文本文件中,再将dest.txt文件中的内容读出显示到屏幕。
#include<stdio.h>
#include<stdlib.h>
int main() {
    FILE *ph, *pf;
    char ch[100], source[100], dest[100];
    if((ph = fopen("source.txt", "r")) == NULL) {
        printf("Cannot open");
        exit(1);
    }
    if((pf = fopen("dest.txt", "w")) == NULL) {
        printf("Cannot creat");
        exit(1);
    }
    while(fgets(ch, 100, ph) != NULL){
        fputs(ch, pf);
        printf("%s",ch);
    }
        
    fclose(ph);
    fclose(pf);
    return 0;
}