C语言指针

 
#include<math.h>
#include<stdio.h>

/*
数组score，一行代表一个学生的四门成绩
输出有不及格的学生的所有成绩
*/
main(){
	float score[][4] = {{60,70,80,90},{56,89,67,88},{34,78,90,66}};
	float * search(float(*pointer)[4]);
	
	float *p;
	int i,j;
	for(i=0;i<3;i++){
		p = search(score+i);
		if(p==*(score+i)){
			printf("No.%d scores :",i);
			for(j = 0;j<4;j++){
				printf("%5.2f\t",*(p+j));
			}
			
			printf("\n");
		}
	}	
}
/*
若学生无不及格成绩，则指针pt指向*(pointer+1)，否则指向*pointer
*/
float * search(float(*pointer)[4]){
	int i;
	float *pt;
	pt = *(pointer+1);
	for(i = 0;i<4;i++){
		if(*(*pointer+i)<60){
			pt = *pointer;
		}
	}
	return pt;
}

运行结果为：

No.1 scores :56.00      89.00   67.00   88.00
No.2 scores :34.00      78.00   90.00   66.00