字符串的比较

#include<stdio.h>#include<string.h>int main(){int m;char str1[20];char str2[20];char *p1;char *p2;printf("input two strings:\n");scanf("str1:\n");scanf("str2:\n");p1=&str1[0];p2=&str2[0];m=strcmp(p1,p2);printf("result:%d,\n",m);return 0;}strcmp(char*p1,char*p2){int i;i=0;while(*(p1+i)==*(p2+i)){if(*(p1+i++)=='\0'){return 0;}}return(*(p1+i)-*(p2+i));}