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access violation 오류입니다.질문 요약 :사진의 오류가 왜나는 건가요? 그리고 소스 잘못된 부분 좀 알려주세요
질문 내용 : gauss 소거법 소스 인데요

짜고 나니까 실행시켜서 숫자 하나 누르니까 에러나 나네요

#include stdio.h
void gauss_jordan_pivoting(float coeff[][20],float known[20] ,int num_eq,int num_var);
void main()
{
int i,j,num_eq, num_var;
float coeff[20] [20], known[20];
printf(Enter the number of equations.:);

scanf(%d,num_eq);printf(Enter the Number of Variables. : );

scanf (%d ,&num_var);

for(i=0;inum_eq;i++)
{

printf(****************************\n);

printf(Enter the coefficients of eq. %d.\n,i+1);

for (j=0;jnum_var;j++)

{
printf(coefficient of variable %d. : , j+1);
scanf(%f,&coeff[i][j]);
}

printf(Enter the Known value of eq.%d. : , i+1);

scanf (%f, &known[i]);
}

printf(***************************************\n);
printf (\n\n Entered Equations :\n);

for (i=0; inum_eq; i++)

{
for (j=0;jnum_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;inum_eq;i++)

{
for(j=0;jnum_var;j++)
{

printf(%10.3f * X%d,coeff[i][j],j+1);

printf(=&10.3f\n,&known[i]);

}
}
}
void gauss_jordan_pivoting(float coeff[][20],float known[20] ,int num_eq,int num_var)

{

int pivot_eq,eq2,var,max_index;

float max_value,ftemp;
for (pivot_eq=0; pivot_eqnum_eq;pivot_eq++)
{
max_index=0;

max_value=coeff[pivot_eq][0];

for(var=0;varnum_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;varnum_var;var++)coeff [pivot_eq][var]/=max_value;

known[pivot_eq]/=max_value;

for(eq2=0; eq2num_eq;eq2++)

{

ftemp=coeff[eq2][max_index];

if (eq2!=pivot_eq)
{

for(var=0;varnum_var;var++)coeff[eq2][var]-=ftemp*coeff[pivot_eq][var];

known[eq2]-=ftemp*known[pivot_eq];
}

}

}

}

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