读程序,写结果()。int main(){ int a[4][4]= {{1,2,-3,-4},{0,-12,-13,14},{-21,23,0,-24},{-31,32,-33,0}}; int i, j, s = 0; for (i=0; i
单选题
读程序,写结果()。int main(){ int a[4][4]= {{1,2,-3,-4},{0,-12,-13,14},{-21,23,0,-24},{-31,32,-33,0}}; int i, j, s = 0; for (i=0; i<4; i++) { for (j=0; j<4; j++) { if (a[i][j] < 0) continue; if (a[i]