第七章例7-9

#include<stdio.h>
int main(void)
{
    int i,j,n,temp;
    int a[6][6];
 
    printf("Enter n:");
    scanf("%d",&n);
    for(i=0;i<n;i++)
        for(j=0;j<n;j++)
            a[i][j]=i*n+j+1;
 
        for(i=0;i<n;i++)
            for(j=0;j<n;j++)
                if(i<=j){
                    temp=a[i][j];
                    a[i][j]=a[j][i];
                    a[j][i]=temp;
                }
 
                for(i=0;i<n;i++){
                    for(j=0;j<n;j++)
                        printf("%4d",a[i][j]);
                    printf(" ");
                }
 
                return 0;
}