使用命令行实用程序中的用户输入 Objective-C Foundation

我正在尝试创建一个应用程序，解决命令行上的二次公式 Objective-C. 我的代码仍然是这样的：

#import <foundation foundation.h="">



int main /int argc, const char * argv[]/{



double a, b, c, sol1, sol2;



NSLog/@"Welcome to the quadratic solver"/;



NSLog/@"Please enter the value of a"/;

scanf/"%f", &amp;a/;



NSLog/@"Please enter the value of b"/;

scanf/"%f", &amp;b/;



NSLog/@"Please enter the value of c"/;

scanf/"%f", &amp;c/;



sol1 = /-b + sqrt/ /double/pow/b,2/ - 4 * a *c/ / / 2 * a;

sol2 = /-b - sqrt/ /double/pow/b,2/ - 4 * a *c/ / / 2 * a;



NSLog/@"If a is: %f, b is %f, and c is %f.", a, b, c/;



NSLog/@"Solution one is: %f", sol1/;

NSLog/@"Solution two is: %f", sol2/;

}

但我的输出没有收到任何信息。

2012-01-26 17:23:53.585 test[4595:707] Welcome to the quadratic solver

2012-01-26 17:23:53.588 test[4595:707] Please enter the value of a

1

2012-01-26 17:23:56.030 test[4595:707] Please enter the value of b

3

2012-01-26 17:23:56.558 test[4595:707] Please enter the value of c

-10

2012-01-26 17:23:58.670 test[4595:707] If a is: 0.000000, b is 0.000000, and c is 0.000000.

2012-01-26 17:23:58.672 test[4595:707] Solution one is: -0.000000

2012-01-26 17:23:58.672 test[4595:707] Solution two is: -0.000000

任何贡献都非常有价值！
</foundation>