Syntax error in C program

#include < st开发者_高级运维dio.h >

int main() {
    char *s;
    s=call();
    printf(s);
}

char* call() {
    return("hello");
}

Why these code not working. It's generating an error. How do I make it work?

---

Two things:

• You can't put spaces inside the angle brackets when including a system header (e.g. #include <stdio.h>
• You need a prototype for call()