#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main() {
    int i=0,score=0;
    FILE *p;
    char ch;
    char c[20]={'\0'};
       char s[20]={'\0'};
       p=fopen("D:\\C Myprogram\\word.txt","r");
    ch=fgetc(p);
    while(ch!=EOF) {
        if(ch!='*') {  
            s[i]=ch;
            printf("%c",ch);
            i++;
        }
        if(ch=='*') {
            printf("从键盘输入英文单词:\n");
            gets(c);
            printf("%d\n",strcmp(c,s));//明明输入一模一样,返回的值要么1要么-1
            if(strcmp(c,s)==0)
                 score++;
        }
        i=0;
        ch=fgetc(p);
    }
    printf("%d\n",score);
    return 0;
}

无知末学恳请各路大神不吝指教，感激不尽！！！

呵呵，问题已解决，帖子上我说的也不清楚。原因是i置0时放错了地方，谢谢关照！