#include <stdio.h>
#include <stdlib.h>
#define row 3
#define col 4
int main(){                     
    int a[row][col]={{1,2,3,4},{5,6,7,8},{9,10,11,12}};
    int i,j,b,c,p;
   
    printf("Input two numbers:",b,c);
    for(i=0;i<row;i++)               
     for(j=0;j<col;j++)               
       scanf("%d",&a[i][j]);
      
   
        for(i=0;i<row;i++){               
          for(j=0;j<col;j++)
           if((i==b)&&(j==c)){
             printf("%d",a[i,j]);}
            else
           printf("/n");}
           
         
        
        
  
      system("PAUSE");   
     return 0;
}
题目：输入一个二维数组，再输入行号和列号，输出对应数值

printf("Input two numbers:",b,c);
     for(i=0;i<row;i++)               
      for(j=0;j<col;j++)               
        scanf("%d",&a[i][j]);
  这是输入两个数字么？
        
     

scanf("%d%d",&b,&c); //输入b,回车后输入c

输出也有大问题，都指定坐标了，还要循环嵌套有什么用？而且二维数组下标写成[x,y]算哪门子语法？直接将a[x][y]输出不就行了。

既然知道行号和列号，直接 printf（"%d",a[b][c]）就可以了

行号和列号在二维数组中应如何表示出来

//题目：输入一个二维数组，再输入行号和列号，输出对应数值
#include<stdio.h>
#include<stdlib.h>
#define row 3
#define col 4
int main()
{
    int a[row][col]={{1,2,3,4},{5,6,7,8},{9,10,11,12}};
    int n,m;
    
    printf("Iuput two number:\n");
    scanf("%d %d",&n,&m);//n表示行号，m表示列号
    if(n>3||n<0||m<0||m>4)
        printf("Error");
    else    
        printf("On behalf of the values is：%d",a[n][m]);
    return 0;
         
}

[此贴子已经被作者于2016-11-19 00:00编辑过]

#include <stdio.h>
 #include <stdlib.h>
 #define row 3
 #define col 4
 int main()
 {                     
     int a[row][col]={{1,2,3,4}, {5,6,7,8}, {9,10,11,12}};
     int i,j,b,c;
     
     printf("Input two numbers:",b,c);
     scanf("%d %d",&b,&c);
        
     
     for(i = 0; i < row; i++){               
       for(j = 0; j < col; j++)
         if((i == b)&&(j == c)){
            printf("\n%d",a[i][j]);
          }
     }
            
      system("PAUSE");   
      return 0;
 }