數組_習題：編寫一個4*4矩陣元素對角線之和的程序

# include <stdio.h> int main(void) { int a[4][4] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}; int i, j, sum1, sum2;//定義sum1,sum2,分別存放兩條對線元素的和； sum1=sum2=0; for(i=0; i<4; i++) { for(j=0; j<4; j++) print

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