#include <stdio.h>

void calculate(int m[3][4]);

int main(void) {

	int a[3][4] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}};

	calculate(a);

	return 0;
}

void calculate(int m[3][4]){

	int sum = 0;

	for(int i=0;i<3;i++){
		
		for(int j=0;j<4;j++){
			
			sum = m[i][j];
		}
	}
	printf("sum=%d",sum);
}