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Home/ Questions/Q 7042239
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Editorial Team
  • 0
Editorial Team
Asked: May 28, 20262026-05-28T02:08:39+00:00 2026-05-28T02:08:39+00:00

Here is my code…I have two dimensional matrices A,B. I want to develop the

  • 0

Here is my code…I have two dimensional matrices A,B. I want to develop the product of the A and B.

#include <stdio.h>
    #include <stdlib.h>

    int main(int argc, char *argv[])
    {

    int scan();
    int multiply();
    int print();

    int metxa[3][4],metxb[4][3],resut[3][3];

    int main();
    {
    scan();
    multiply();
    print();
    return 0;
    }
    int scan();
    {
    int i;
    for(i=0;i<3;i++)
    {
    scanf("%d %d %d %d",&metxa[i][0],&metxa[i][1],&metxa[i][2],&metxa[i][3]);
    }
    for(i=0;i<4;i++)
    {
    scanf("%d %d %d",&metxb[i][0],&metxb[i][1],&metxb[i][2]);
    }
    }
    int multiply();
    {
    int i,j;
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    resut[i][j]=metxa[i][0]*metxb[0][j]+metxa[i][1]*metxb[1][j]+metxa[i][2]*metxb[2][j]+metxa[i][3]*metxb[3][j];

    }
    }
    }
    int print();
    {
    int i,j;
    for(i=0;i<3;i++)
    {
    for(j=0;j<3;j++)
    {
    printf("%d\t",resut[i][j]);
    }
    printf("\n");
    }
    }
    system("PAUSE");
    return 0;
    }

but I got linker error-undefined reference to scan and multiply methods… why should I get this error?

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-05-28T02:08:40+00:00Added an answer on May 28, 2026 at 2:08 am

    Semi-colon after function name at definition:

    int scan();
    {
        ...
    }
    

    Should be:

    int scan()
    {
        ...
    }
    

    Same for multiply() and print() functions.

    Also:

    • Neither scan(), multiply() and print() return a value yet their return value is int.
    • scan(), multiply(), print() and declared and defined within main().

    Here is the posted code in a compilable state (I am making no declaration as to is correctness):

    #include <stdio.h>
    #include <stdlib.h>
    
    void scan();
    void multiply();
    void print();
    
    int metxa[3][4],metxb[4][3],resut[3][3];
    
    int main(int argc, char *argv[])
    {
        scan();
        multiply();
        print();
        system("PAUSE");
    
        return 0;
    }
    
    void scan()
    {
        int i;
        for(i=0;i<3;i++)
        {
            scanf("%d %d %d %d",
                  &metxa[i][0],
                  &metxa[i][1],
                  &metxa[i][2],
                  &metxa[i][3]);
        }
        for(i=0;i<4;i++)
        {
            scanf("%d %d %d",
                  &metxb[i][0],
                  &metxb[i][1],
                  &metxb[i][2]);
        }
    }
    
    void multiply()
    {
        int i,j;
        for(i=0;i<3;i++)
        {
            for(j=0;j<3;j++)
            {
                resut[i][j] = metxa[i][0]*
                              metxb[0][j]+metxa[i][1]*
                              metxb[1][j]+metxa[i][2]*
                              metxb[2][j]+metxa[i][3]*
                              metxb[3][j];
            }
        }
    }
    
    void print()
    {
        int i,j;
        for(i=0;i<3;i++)
        {
            for(j=0;j<3;j++)
            {
                printf("%d\t",resut[i][j]);
            }
            printf("\n");
        }
    }
    
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