1、第九章 指針（四）主講：蕭英喆2022/9/182013年計算機等級考試陪訓(xùn) 二級C語言指針與函數(shù)主要內(nèi)容指針變量作為參數(shù)數(shù)組名作為參數(shù)指針函數(shù)指向函數(shù)的指針指針作為參數(shù)指針變量作為參數(shù)和其他變量一樣：傳遞值void exchange(int *pointer1, int *pointer2) int temp; temp=*pointer1; *pointer1=*pointer2; *pointer2=temp; main() int num1,num2; int *num1_p=&num1; int *num2_p=&num2; printf(“Input the 1st number:

2、 ”); scanf(“%d”, num1_p); Printf(“Input the 2nd number: ”); scanf(“%d”, num2_p); printf(“num1=%d,num2=%dn”, num1, num2); if(*num1_p*num2_p ) exchange(num1_p, num2_p); printf(“min=%d,max=%dn”, num1,num2); 數(shù)組名作為參數(shù)：形參和實參數(shù)組名與指針變量的配合：四種float aver(float *pa) int i; float av,s=0; for(i=0;i5;i+) s=s+*pa+; a

3、v=s/5; return av;main() float sco5,av,*sp; int i; sp=sco; printf (ninput 5 scores:n); for(i=0;ib)return a; else return b;main() int (*pmax)(); int x,y,z; pmax=max; printf(“input two numbers:n”); scanf(“%d,%d,&x,&y); z=(*pmax)(x,y); printf(maxmum=%d,z);指針函數(shù)返回值是一個指針類型的函數(shù)類型說明 *變量名(參數(shù)表) int (*p)();int *

4、p();指針函數(shù)返回值是一個指針類型的函數(shù)main() int i; char *day_name(int n); printf(input Day No:n); scanf(%d,&i); if(i%sn,i,day_name(i);char *day_name(int n)static char *name=Illegal day, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, ;return(n7) ? name0 : namen);指針小節(jié)快速回憶下面的內(nèi)容1)內(nèi)存地址、變量地址、指針、指針變量2)指針變量的運算3