c语言编程从一个三行四列的整型二维数组中按行优先查找第一个出现的...答:include<stdio.h>#include<string.h>#include<stdlib.h>int main(){ int a[3][4] = {{41,345,35,23}, {41,345,-2,23}, {41,345,35,23}}; int flag=1; for(int i=0;i<3 && flag;i++){ for(int j=0;j<4;j++){ if(a[i][j]<0){ printf...