我用Xcode作为编译器学习C语言，代码如下：

 #include <stdio.h>
int main(void)
{
    float weight;
    float value;
    printf("are you worth your weight in rhodium?\n");
    printf("let's check it out.\n");
    printf("please enter your weight in pounds: ");
    scanf("%f", &weight);
    value = 770 * weight * 14.5833;
    printf("your weight in rhodium is worth $%.2f.\n", value);
    printf("you are easily worth that! If rhodium prices drop,\n");
    printf("eat more to maintain your value.\n");
    return 0;
}

按理说代码应该没有问题，但是我编译后输出结果却是这样：

 are you worth your weight in rhodium?
let's check it out.
please enter your weight in pounds: 150
your weight in rhodium is worth $310815099620643345268736.00.
you are easily worth that! If rhodium prices drop,
eat more to maintain your value.

另外，我发现Xcode中有以下内容：

我用其他编译器显示的是正确的结果。请问为什么Xcode中会变成这样奇怪的数字，应该如何设置或修改？
菜鸟拜谢大神～～～！！！