return(a[0][0]+a[0][2]+a[ 1][ 1]+a[2][0]+a[2][2]);
}
int i,j;
Floating point a[3][3], * p [3];
for(I = 0; I<3; i++)for(j = 0; j & lt3; j++){
scanf("%f ",& ampa[I][j]); //floating-point format %f
}
p[0]= & amp; a[0][0]; p[ 1]= & amp; a[ 1][0]; p[2]= & amp; a[2][0]; // 3 pointers
printf("sum=%0.2f\n ",matrix(p)); //Call.
============
General examples (known array rows and columns, dynamically allocated arrays) how to pass numerical values:
# include & ltstdio.h & gt
void fun 1(int *mat,int N_row,int N_col){
int i,j;
for(j = 0; j & ltN _ rowj++){
for(I = 0; I<N _ coli++) printf("%d ",mat [j * n _ col+I]);
printf(" \ n ");
}
}
void fun2(int **mat,int N_row,int N_col){
int i,j;
for(j = 0; j & ltN _ rowj++){
for(I = 0; I<N _ coli++) printf("%d ",mat [j] [i]);
printf(" \ n ");
}
}
int main()
{
int arr[3][4]={{ 1 1, 12, 13, 14},{2 1,22,23,24},{3 1,32,33,34 } };
int * * a;
int NR,NC,j,I;
fun 1。 arr[0][0],3,4);
printf(" input nrow ncol \ n ");
scanf("%d %d ",& ampNR,& ampNC);
a =(int * *)malloc(sizeof(int *)* NR);
for(j = 0; j & ltNR; j++){
a[j]=(int *)malloc(sizeof(int)* NC);
}
Printf ("input matrix data \ n");
for(j = 0; j & ltNR; j++)for(I = 0; I & ltNC;; i++) scanf("%d ",& ampa[j][I]);
fun2( a,NR,NC);
Returns 0;
}