已知一个二维数组a[3][3],求其主对角线元素之和s1,次对角线元素之和s2...答:void main(){int a[3][3]={1,3,5,7,9,11,13,15,17},s1=0,s2=0,i,j;for(i=0;i<3;i++)for(j=0;j<3;j++){if(i==j)s1=s1+a[i][j];if(i==2-j) s2=s2+a[i][j];} printf("s1=%d,s2=%d\n",s1,s2);} ...
C语言中,求二维数组的每一行的和与平均值答:include <stdio.h>#include <string.h>int main(){int i=0,j=0,total=0;float avr=0;int a[3][3] = {{1,2,3},{4,5,6},{7,8,9}};for (i=0;i<3;i++){total=0;for (j=0;j<3;j++){total +=a[i][j];}avr = (float)(total/3.0);printf("sum[%d] aver[%...