c - 如何在C中扫描复数数组

Question

int input,n,i;
    scanf("%d%d",&input,&n);
    double a,b;
    double complex arr[n];

      for (i = 0; i < n; ++i)
      {
         scanf("%lf%lf",&a,&b);
         creal(arr[i])=a;
         cimag(arr[i])=b;
       }

错误:需要左值作为赋值的左操作数在此处输入代码 真实(arr[i])=a; 为什么我不能接受复数数组的输入

Answer 1

根据6.2.5p13 ，你可以做(​​未经测试!)

double complex a[42];
double tmp[2];
tmp[0] = 3.14159;
tmp[1] = -2.71828;
memmove(a + 3, tmp, sizeof tmp); // a[3] = 3.14159 - 2.71828i