Wrong scanf in 2D array - c

Question

I have the following code:
#include <stdio.h>
int main() {
int tc,T;
scanf("%d", &T);
for(tc=0; tc<T; tc++){
int flag=0;
int R,C;
scanf("%d %d", &R, &C);
{
int i,j;
int r,c;
int Grid[R][C];
//Read the Grid
for(i=0; i<R; i++){
for(j=0; j<C; j++){
scanf("%d", &Grid[i,j]);
}
}
scanf("%d %d", &r, &c);
{
int Pattern[r][c];
//Read the Grid
for(i=0; i<r; i++){
for(j=0; j<c; j++){
scanf("%d", &Pattern[i,j]);
}
}
//Here we have both the Grid and the Pattern
for(i=0; i<R; i++){
for(j=0; j<C; j++){
if(Grid[i,j]==Pattern[0,0] && ((i+r)<=R) && ((j+c)<=C)){
int x,y;
int innerFlag=1;
for(x=0; x<r; x++){
for(y=0; y<c; y++){
if(Grid[x+i,y+j]!=Pattern[x,y]) innerFlag=0;
}
}
if(innerFlag == 1){
//Set the flag to 1 and break out of the nested loops
flag=1;
j=C;
i=R;
}
}
}
}
//Here all the calculation is done and the flag is set
if(flag==1) printf("YES\n");
else printf("NO\n");
}
}
}
return 0;
}
Which gives me the following errors:
warning: format '%d' expects argument of type 'int ', but argument 2 has type 'int ()[(sizetype)(C)]'
scanf("%d", &Grid[i,j]);
warning: format '%d' expects argument of type 'int ', but argument 2 has type 'int ()[(sizetype)(c)]'
scanf("%d", &Pattern[i,j]);
Do you know what's wrong with this code?
P.S I also checked the Grid and the Pattern and it reads trash!

Answer 1

In C you should subscript arrays like this: array[i][j].
array[i, j] is equivalent to array[j], since i is ignored.

Answer 2

Arrays in c are not accessed like Grid[i, j] but as Grid[i][j]. So change it to that in your code. Similarly Pattern[i, j] should be written as Pattern[i][j].
This will solve your problem.
Happy to Help! :)

Answer 3

Try something like following:
#include <stdio.h>
int main() {
int tc,T;
printf("Enter one number\n");
scanf("%d", &T);
for(tc=0; tc<T; tc++){
int flag=0;
int R,C;
printf("Enter 2 numbers\n");
scanf("%d %d", &R, &C);
{
int i,j;
int r,c;
int Grid[R][C];
printf("now reading the grid\n");
//Read the Grid
for(i=0; i<R; i++){
for(j=0; j<C; j++){
scanf("%d", &Grid[i][j]);
}
}
printf("Enter 2 mre numbers\n");
scanf("%d %d", &r, &c);
{
int Pattern[r][c];
printf("now reading the pattern\n");
//Read the Grid
for(i=0; i<r; i++){
for(j=0; j<c; j++){
scanf("%d", &Pattern[i][j]);
}
}
//Here we have both the Grid and the Pattern
for(i=0; i<R; i++){
for(j=0; j<C; j++){
if(Grid[i][j]==Pattern[0][0] && ((i+r)<=R) && ((j+c)<=C)){
int x,y;
int innerFlag=1;
for(x=0; x<r; x++){
for(y=0; y<c; y++){
if(Grid[x+i][y+j]!=Pattern[x][y]) innerFlag=0;
}
}
if(innerFlag == 1){
//Set the flag to 1 and break out of the nested loops
flag=1;
j=C;
i=R;
}
}
}
}
//Here all the calculation is done and the flag is set
if(flag==1) printf("YES\n");
else printf("NO\n");
}
}
}
return 0;
}