指针的 --

指针的 --

#include <stdio.h>
int main()
{
    int i;
    double score[5] = {10,20,32,40,50};
    double *ptr_score;
    ptr_score = &score[1];   // 20
    ptr_score +=2;            //40
    printf("%.2lf\t",*ptr_score);
    ptr_score -=3;            //10
    printf("%.2lf\t",*ptr_score);
}