Question

我是c 的初学者，我无法将其初始化局部变量dotP。当我运行它给出的代码时我这个错误：错误C4700：未初始化的局部变量'dotP'使用。请告诉我代码以及插入初始化代码的位置。任何其他更正将不胜感激。

 #include<stdio.h>
 #include "stdafx.h"
 #include <stdlib.h>
 #include <time.h>

 #define N 10
 float AUX;


 typedef struct complex{
double a;
double b;
 }complex;


 double randN(double min, double max){

double range = (max - min);
double div = max / range;
return min + (rand() / div);

  }

void fillVector(complex* v1, complex* v2){
int i = 0;


for (i = 0; i< N; i++){
    v1[i].a = randN(0, 100);
    v1[i].b = randN(0, 100);
    v2[i].a = randN(0, 100);
    v2[i].b = randN(0, 100);
  }
  }


 void calculate(complex* v1, complex* v2){
int i = 0, j = 0;


complex dotP;
complex c1, c2;

for (i = 0; i< N; i++){
    for (j = 0; j <N; j++){
        c1.a = v1[i].a;
        c1.b = v1[i].b;
        c2.a = v2[j].a; c2.b = v2[j].b; 
        // 


        dotP.a += ((c1.a*c2.a) - (c1.b*c2.b)); /* take care of real part */
        dotP.b += ((c1.a*c2.b) + (c1.b*c2.a)); /*take care of imaginary */
       }
   }
     }


    int main()
      {

clock_t begin, end;
double time_spent;


complex* v1 = (complex *)malloc(sizeof(complex)*N);
complex* v2 = (complex *)malloc(sizeof(complex)*N);

begin = clock(); /* init clock */
calculate(v1, v2); /*consume time */
end = clock();  /*stop clock */
time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
printf("Elapsed: %f seconds\n", (double)(end - begin) / CLOCKS_PER_SEC);/*showdata*/

return 0;
         }

Answer 1

或者：

complex dotP;
...
dotP.a = 0.0;
dotP.b = 0.0;

或者

complex dotP = {0.0, 0.0};

不确定如何初始化此局部变量

1 个答案: