근데 나머지 이거 오류 3개는 어떻게 해야되는지 모르겠엉 ㅠㅜ

저거 오류 클릭해보면 가리키는곳은 글씨 크게 해놓은 곳인데 ;;

저기서 뭐가 잘못된거야?  좀 도와줘 형들 ㅠㅜ





#include "stdafx.h"
#include "stdio.h"

void main()
{
        int i,j,k,num_eq, num_var;
        float coeff[20] [20], known[20];

        printf("Enter the Number of Equations. : ");
        scanf_s("%d",&num_eq);
        printf("Enter the Number of Variables. : ");
        scanf_s("%d",&num_var);
        for(i=0; i<num_eq; i++){
                printf("*********************\n");
                printf("Enter the Coefficients of eq. %d. 

\n", i+1);
                for(j=0; j<num_var; j++){
                        printf("coefficient of variable %d. 

: ", j+1);
                        scanf_s("%f",&coeff[i][j]);
                }
                printf("Enter the Known Value of eq. %d. : 

",i+1);
                scanf_s("%f",&known[i]);
        }
        printf("********************************\n");

        printf("\n\n Entered Equations :\n");
        for(i=0;i<num_eq; i++){
                for(j=0; j<num_var; j++){
                        printf("%10.3f * X%d", coeff[i][j], 

j+1);
                        if(j!=num_var-1) printf("+");
                        else printf("=");
                }
                printf("%10.3f\n",known[i]);
        }


        gauss_jordan_pivoting(coeff,known,num_eq,num_var);
        {
        printf("\n\n**********************************\n");
        printf("Results : \n");
        for(i=0;i<num_eq; i++){
                for(j=0; j<num_var; j++)
                        printf("%10.3f * X%d ", coeff [i]

[j], j+1);
                printf("= %10.3f\n", known[i]);
        }
}

void gauss_jordan_pivoting(coeff,known,num_eq, num_var)


        float coeff[20][20], known[20];
int num_eq, num_var;
{
        int pivot_eq, eq2, var, max_index;
        float max_value, ftemp;

        for (pivot_eq=0; pivot_eq<num_eq; pivot_eq++){

                max_index=0;
                max_value=coeff[pivot_eq][0];
                for(var=0; var<num_var; var++)

if(coeff[pivot_eq][var]*coeff[pivot_eq][var]

>max_value*max_value){
                
                max_index=var;
                max_value=coeff[pivot_eq][var];
}


for(var=0; var<num_var;var++)
        coeff[pivot_eq][var]/=max_value;
known[pivot_eq]/=max_value;


for(eq2=0; eq2<num_eq; eq2++){
        ftemp=coeff[eq2][max_index];
        if(eq2!=pivot_eq){
                for(var=0; var<num_var; var++)

                        
coeff[eq2][var] -=ftemp*coeff[pivot_eq][var];
                                        known[eq2]-

=ftemp*known[pivot_eq];
        }
}
        }
}