Basically, I'm trying to create another array to save the sum of the number in the first position in "arreglo1" with the last one in "arreglo2" (3 1), but I get an error at time of compiling that says "expression must have pointer-to-object type but it has type int". What am I doing wrong? ;(

#include <stdio.h>
int funcion1(int arreglo1,int arreglo2);
int main()
{
int arreglo1[5]={3,5,1,4,-2};
int arreglo2[5]={8,7,2,5,1};
funcion1 (arreglo1,arreglo2);    
}
int funcion1(int arreglo1,int arreglo2){
    int arreglo3[]={};
    int n=5;
    int i;
    int suma;
    for ( i = 0; i < 5; i  )
    {
        arreglo3[i]= arreglo1[i] arreglo2[n-1];
    }
    for ( i = 0; i < 5; i  )
    {
        printf("%d",arreglo3[i]);
    }
}

CodePudding user response：

I am also beginner so please tell me if i am wrong.

The problem here is that you are defining the function with:

int fuction1(int aareglo1, int arreglo2);

You are defining that the function takes an integer as an input, but you are giving an array as an input, so the correct code should be:

int function1(int arrenglo1[], int arrenglo2[]);

And there is also a problem with its logic, you are giving the value to arrenglo3 as:

arrenglo3[i] = arrenglo1[i]   arrenglo2[n-1];

Whereas, it should be:

arrenglo3[i] = arrenglo1[i]   arrenglo2[n-i-1];

I have modified the code and it compiles correctly(atleast in my compiler):

#include <stdio.h>
int funcion1(int arreglo1[],int arreglo2[]);

int main()
{
    int arreglo1[5]={3,5,1,4,-2};
    int arreglo2[5]={8,7,2,5,1};
    funcion1 (arreglo1,arreglo2);    
}
int funcion1(int arreglo1[],int arreglo2[]){
    int arreglo3[5];
    int n=5;
    int i;
    int suma;
    for ( i = 0; i < 5; i  )
    {
        arreglo3[i]= arreglo1[i] arreglo2[n-i-1];
    }
    for ( i = 0; i < 5; i  )
    {
        printf("%d\n",arreglo3[i]);
    }
}

CodePudding user response：

int arreglo1 suggests arreglo1 is an integer. However, you have passed in an array.

Modify your funcion1 to take a pointer to ints, as so:

int funcion1(int *arreglo1, int *arreglo2);

after that, this line:

int arreglo3[]={};

creates a zero-length array, you want 5 items, so write:

int arreglo3[5];

then actually compute suma and return it.