Question

Here is my code

char* a[10];
a[0]="'example'";
char* p;
p=strstr(a[0],"'");

I know if strstr can find the ' it returns a pointer which points to first character which is '. I want to take the value between two ' and save it in a[1]. how should I do that?
As a result
a[1] is "example".

Answer 1

Just find the next occurrence of ' and copy the substring:

char* a[10];
a[0]="'example'";
char* p, *q;
p=strstr(a[0],"'");
if (p) {
    q = strstr(p+1, "'");
    if (q) {
        size_t len = (size_t)(q - p);
        char *sub = malloc(len + 2);
        if (!sub) {
            /* Oops */
            exit(EXIT_FAILURE);  /* Something more sensible rather */
        }
        memcpy(sub, p, len+1);
        sub[len+1] = 0;
        a[1] = sub;
     }
     else {
         a[1] = NULL;
     }
}
else {
    a[1] = NULL;
}

Note that in this case, it would be better to use strchr to find the single character.