c - C 函数中的错误和警告

Question

我的警告和错误，我需要修复错误:

exercici17b.c: In function ‘main’:
exercici17b.c:16:1: error: incompatible type for argument 1 of ‘imprimeixvector’
 imprimeixvector(res[5], resu, mat[3][3], vect[3]);
 ^
exercici17b.c:4:5: note: expected ‘double *’ but argument is of type ‘double’
 int imprimeixvector(double res[5], double resu, double mat[3][3], double vect[3]);
     ^
exercici17b.c:16:1: error: incompatible type for argument 3 of ‘imprimeixvector’
 imprimeixvector(res[5], resu, mat[3][3], vect[3]);
 ^
exercici17b.c:4:5: note: expected ‘double (*)[3]’ but argument is of type ‘double’
 int imprimeixvector(double res[5], double resu, double mat[3][3], double vect[3]);
     ^
exercici17b.c:16:1: error: incompatible type for argument 4 of ‘imprimeixvector’
 imprimeixvector(res[5], resu, mat[3][3], vect[3]);
 ^
exercici17b.c:4:5: note: expected ‘double *’ but argument is of type ‘double’
 int imprimeixvector(double res[5], double resu, double mat[3][3], double vect[3]);
     ^
exercici17b.c: In function ‘imprimeixvector’:
exercici17b.c:48:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

我的代码是这样的:代码必须将矩阵乘以 vector 并将结果作为另一个 vector 给出，并且我在函数中遇到参数类型错误。

#include <stdio.h>
#include <math.h>

void imprimeixvector(double, double, double, double);

int main()
{
  double res[5], resu=0;
  double vect[3]={1.1, 2.2, 3.3};
  double mat[3][3]={
              {1., 1., 0.},
              {0., 1., 1.},
              {1., 0., 1.}      //matriu 3x3
            };

imprimeixvector(res[0], resu, mat[0][0], vect[0]);

printf("\n");
  return 0;
}


void imprimeixvector(double res[5], double resu, double mat[3][3], double vect[3])
{
  int i, j;
  for(i=0; i<3; i++)
  {
    for(j=0; j<3; j++)
    {
      res[i]=vect[j]*mat[i][j];
      resu=resu+res[i]; 
    }
  printf("%d,", (int) resu);
  resu=0;
  }
}

Answer 1

替换

void imprimeixvector(double, double, double, double);

与

void imprimeixvector(double res[5], double resu, double mat[3][3], double vect[3]);

在声明中

然后在main中正确调用该函数

imprimeixvector(res, resu, mat, vect);