Suma de Matriz

 #include <stdio.h>
 
 	int main () {
 		int matriz[4][4]={{3,18,9,0},{20,-50,7,-1},{5,7,8,4},{-5,-20,31,18}};
 		int ren, col;
 		
 		for(ren=0; ren<4;ren++){
 				for (col=0; col<4; col++){
 					printf("n%d", matriz[ren][col]);
 					if (matriz[ren][col]%4==0 && matriz[ren][col]>0 );
 						i++
 				}
 					printf("\n";)
 		}
 			return 0;
 	}