花了几分钟写了一下：顺便回答了提问者http://gouwu.baidu.com/question/1541765680005358067.html?entry=qb_browse_defaulthttp://wenwen.sogou.com/z/q630335897.htm?ch=iks.w.wt#include "stdio.h"void main(){int a[3][4]={5,7,12,3,10,4,6,9,8,1,2,11};int i,j,t;for(i=0;i<3;i++){for(j=0;j<4;j++){printf("%3d",a[i][j]);}printf("\n");}printf("max:\n") ;for(j=0;j<4;j++){ t=a[0][j];for(i=0;i<3;i++) { if(a[i][j]>t)t=a[i][j];}printf("%3d",t);}printf("\nmin:\n") ;for(j=0;j<4;j++){ t=a[0][j];for(i=0;i<3;i++){if(a[i][j]