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[%...