c - 函数宏gerring : undefined reference to `Printf' collect2: error: ld returned 1 exit status

Question

#include <stdio.h>
#define AVERAGE 25
#define MIN (AVERAGE - 5)
#define MAX (AVERAGE + 5)


#define CHECK(value) if(value < AVERAGE){\
                printf("small value");\
                    } \
                else if(value >AVERAGE){\
                        printf("big value");\
                    }else{Printf("it is average");  }

int main()
{

int num=0;
int i;
CHECK(num);

return 0;
}

编译后得到的错误是:

/home/solomon/c_revision/macros.c:22: undefined reference to `Printf'
collect2: error: ld returned 1 exit status

其中 c:22 是我调用 check 的地方。我不知道为什么它会给我上面的错误。有人可以帮忙

Answer 1

打印错误，宏发生变化

Printf("it is average") to printf("it is average")