c - 此文本文件上的 fscanf() 错误？

Question

测试.txt:

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
ccccccccccccccccccccccccccccccccccc
The color of the car is blue

代码:

FILE *fp;
char var[30];
int result

if( (fp = fopen( "test.txt", "r")) == NULL)  //open for read
    printf("ERROR");


result = fscanf( fp, "The color of the car is %s", &var);

执行后:

opens file (not NULL and was able to execute an append when testing)
result = 0 //zero- in the case of a matching failure....?
errno = 0;
and var is garbage.

我期待 fscanf() 匹配“blue”。

我应该如何正确地将 blue 放入 var 中？ 谢谢。

Answer 1

如何使用 fgets 代替:

char *search = "The color of the..";
char *p;
while (fgets(var, SIZE, stdin)) {
    /* Does it have what we want ? */
    if ((p = strstr(var, search)))
        break;
}

if (p)
    p += strlen(str);