[英]can't do multiplication operation on 'double' numbers
I am trying to write some functions for Complex type numbers, but I couldn't make this work. 我正在尝试为复杂类型数字编写一些函数,但无法完成这项工作。
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
typedef struct{
double a; /* Real*/
double b; /* Imaginary*/
}Complex;
Complex Nmbr1,Nmbr2;
int main()
{
Complex NmbrMulti;
printf("Type the value of the real part of the first number\n");
scanf("%d",&Nmbr1.a);
printf("\nType the value of the Imaginary part of the first number\n");
scanf("%d",&Nmbr1.b);
printf("\nType the value of the real part of the second number\n");
scanf("%d",&Nmbr2.a);
printf("\nType the value of the Imaginary part of the second number\n");
scanf("%d",&Nmbr2.b);
NmbrMulti.a = Nmbr1.a * Nmbr2.a - Nmbr1.b * Nmbr2.b ;
NmbrMulti.b = Nmbr1.a * Nmbr2.b + Nmbr2.a * Nmbr1.b ;
printf("\nThe Multiplication : %d+i", NmbrMulti.a);
printf("%d\n", NmbrMulti.b);
return 0;
}
but I get the result 0+i0
, it seems that the problem is with the operations, is there another way to do multiplication for double numbers that I'm not aware of ? 但我得到的结果是0+i0
,似乎问题出在运算上,还有另一种方法可以对我不知道的双数进行乘法运算吗?
When scanf
sees %d
, the corresponding argument must be a pointer to int
. 当scanf
看到%d
,相应的参数必须是指向int
的指针。 If the argument is a pointer to double
, the code should be %lf
. 如果参数是指向double
的指针,则代码应为%lf
。
Reference 参考
http://www.cplusplus.com/reference/cstdio/scanf/ http://www.cplusplus.com/reference/cstdio/scanf/
Formatting for double
in C is lf
rather than d
. 在C中将double
格式化为lf
而不是d
。 The latter implies and int
. 后者暗示和int
。
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