[C] Bubble Sort

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int i=0, j=0;
    float grade[8]={63.5,74.2,58.7,91.3,68.2,85.7,39.9,78.5};
    float tmp;
   
    printf( "before sort : ");
    for(i=0;i<8;i++)
    {
       printf("%.1f ",grade[i]);
    }
    printf("\n");   
    for(i=0;i<8;i++)
    {
       for(j=0;j<7;j++)
       {
          if( grade[ j ] > grade[ j+1 ] )
          {
              tmp = grade[j+1];
              grade[j+1] = grade[j];
              grade[j] = tmp;
          }
       }
    }
    printf( "after sort : ");
    for(i=0;i<8;i++)
    {
       printf("%.1f ",grade[i]);
    }
    printf("\n");
    system( "pause" );
    return 0;
}