C语言~写出4位整数，然后从大到小排出

void main()
{
int a[4],i,j,t;
for(i=0;i<4;i++){
printf("please input the %d th number:",i+1);
scanf("%d",&a[1]);
}

for(i=0;i<4,i++)
for(j=0;j<4-i-1;j++){
if(a[j]>a[j+1])
{t=a[j];a[j]=a[j+1];a[j+1]=t;}
}
printf("the num from big to small :\n");
for(i=0;i<4;i++)
printf("%d ",a[i]);

^_^

#include "stdio.h"
main(){
int a[4];
int i,j,t;
for(i=0;i<4;i++){
printf("输入第%d个数字:",i+1);
scanf("%d",&a[i]);
}
for(i=3;i>=1;i--){
for(j=0;j<i;j++)
if(a[j]<a[j+1])
{t=a[j];a[j]=a[j+1];a[j+1]=t;}
}
printf("从大到小依次是:");
for(i=0;i<4;i++){
printf("%d ",a[i]);
}
}

上楼有误,已改正