#include <stdio.h>
#include <stdlib.h>
 
int count(int r, int c, int a[r][c]);
int main(void) {
	int a[2][5] ={ {10,19,1,-6,4},{8,0,-9,99,45}};
 
	printf("number of two digits number is %d.\n", count(2, 5, a));
}
 
int count(int r, int c, int a[r][c]){
	int k = 0;
    for (int i = 0; i < r; i++){
        for(int j = 0; j < c; j++){
        	int num = abs(a[i][j]);
            if(9 < num && num < 100)
            	++k;
        }
    }
    return k;
}
 

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