输出若干学生3门课程的成绩。 include ＜stdio.h＞ 【 】 struct student

{ int num; float score[3]; } main () { int i=0, n; float a[3]; 【 】*ptr [200]; printf ("请输入学生学号和3门课成绩，学号为0表示数据输入结束\n"); do { ptr[i]=(struct student *)malloc(sizeof(struct student)); scanf("%d%f%f%f",&ptr[i]-＞num,&a[O],&a[1],&a[2]); ptr[i]-＞score[O]=a[O]; ptr[i]-＞score[1]=a[1]; ptr[i]-＞score[2]=a[2]; if(【 】) break; i++; }while(1); n=i-1; 【 】; for(i=O;i＜=n;i++) printf("%-6d%.1f %.1f %.1f\n",ptr[i]-＞num, ptr[i]-＞score[0], ptr[i]-＞score[1], ptr[i]-＞score[2]); }