实验九 指针1
#include <stdio.h> void findByPoint(int *, int, int *, int *); void find(int *a, int n, int max, int min); int main(void) { int max1=0, min1=0, a[]={5,3,7,9,2,0,4,1,6,8}; findByPoint(a,10,&max1,&min1); //数组a有十个数,将max1 min1的地址作为实参 printf("数组a最大和最小元素下标是%d,%d\n", max1, min1); int max2=0, min2=0,b[]={3,4,71,9,2,7,4,2,6,90}; find(b, 10, max2, min2); //不要变量类型,max2 min2为变量 printf("数组b最大和最小元素下标是%d,%d\n", max2, min2); return 0; } void findByPoint(int *a, int n, int *max, int *min) { int i; *max=*min=0; for (i = 1; i < n; i++) { if (a[i] > a [*max])*max=i; //找出最大值i并将其值赋给*max if (a[i] < a [*min])*min=i;//找出最小值i并将其值赋给*min } } void find(int *a, int n, int max, int min) { int i; for (i = 1; i < n; i++) { if (a[i] > a [max]) max=i;//找出最大值i并将其值赋给max if (a[i] < a [min]) min=i; //找出最小值i并将其值赋给min } printf("数组b最大和最小元素下标是%d,%d\n", max, min); }
#include<stdio.h> void f(char *line,int *letter,int *number,int *other); int main(void) { int i=0,letter,number,other; char ch,str[80]; printf("输入一行字符:"); ch=getchar(); while(ch!='\n') { str[i]=ch; i++; ch=getchar(); } str[i]='\0'; f(str,&letter,&number,&other); printf("letter=%d number=%d other=%d\n",letter,number,other); return 0; } void f(char *line,int *letter,int *number,int *other) { *letter=*number=*other=0; while(*line!='\0') { if(*line>='0'&&*line<='9') (*number)++; else if((*line>='a'&&*line<='z')||(*line>='A'&&*line<='Z')) (*letter)++; else (*other)++; line++; } }
//判断回文数 用指针 #include<stdio.h> #include<string.h> int main(void) { char a[50]; //定义一个数组 char*p,*q; int len,flag; gets(a); //逐个读取a中的字符 len=strlen(a); //计算字符串的长度 p=a; q=a+len-1; flag=1; while(p<q){ if(*p==*q) { p++; q--; } else { flag=0; break; } } if(flag) printf("yes\n"); else printf("no\n"); return 0; }