#include <stdio.h>#include <stdlib.h>#include <ctype.h>#include <string.h>//字符串替换函数/********************************************************************* Function： my_strstr()* Description: 在一个字符串中查找一个子串;* Input：ps: 源;pd：子串* Return : 0：源字符串中没有子串; 1：源字符串中有子串;*********************************************************************/char * my_strstr(char * ps,char *pd){char *pt = pd;int c = 0;while(*ps != '\0'){if(*ps == *pd){while(*ps == *pd && *pd!='\0'){ps++;pd++;c++;}}else{ps++;}if(*pd == '\0'){return (ps - c);}c = 0;pd = pt;}return 0;}/********************************************************************* Function： memcpy()* Description: 复制一个内存区域到另一个区域;* Input：src: 源;count: 复制字节数.* Output：dest: 复制目的地;* Return :dest;*********************************************************************/void * memcpy(void * dest,const void *src,size_t count){char *tmp = (char *) dest, *s = (char *) src;while (count--)*tmp++ = *s++;return dest;}/********************************************************************* Function： str_replace()* Description: 在一个字符串中查找一个子串，并且把所有符合的子串用另一个替换字符串替换。* Input：p_source:要查找的母字符串； p_seach要查找的子字符串;p_repstr：替换的字符串;* Output：p_result:存放结果;* Return :返回替换成功的子串数量;* Others:p_result要足够大的空间存放结果，所以输入参数都要以\0结束;*********************************************************************/int str_replace(char *p_result,char* p_source,char* p_seach,char *p_repstr){int c = 0;int repstr_leng = 0;int searchstr_leng = 0;char *p1;char *presult = p_result;char *psource = p_source;char *prep = p_repstr;char *pseach = p_seach;int nLen = 0;repstr_leng = strlen(prep);searchstr_leng = strlen(pseach);do{ p1 = my_strstr(psource,p_seach);if (p1 == 0){strcpy(presult,psource);return c;}c++; //匹配子串计数加1;printf("结果:%s\r\n",p_result);printf("源字符:%s\r\n",p_source);// 拷贝上一个替换点和下一个替换点中间的字符串nLen = p1 - psource;memcpy(presult, psource, nLen);// 拷贝需要替换的字符串memcpy(presult + nLen,p_repstr,repstr_leng);psource = p1 + searchstr_leng;presult = presult + nLen + repstr_leng;}while(p1);return c;}#define MAX 200int main(void){int i = 0;char s[MAX] ={0}; //存放源字串char s1[MAX]={0}; //存放子字串char s2[MAX]={0}; //存放替换字串char result_a[2000] = {0};//存放替换结果;char *p,*ptm,*pr;puts("Please input the string for s:");scanf("%s",s);puts("Please input the string for s1:");scanf("%s",s1);puts("Please input the string for s2:");scanf("%s",s2);ptm = s;pr = result_a;i = str_replace(pr,ptm,s1,s2);printf("替换%d个子字符串;\r\n",i); printf("替换后结果:%s\r\n",result_a);system("pause");}
/Linux/-01/77972.htm
接受网友的建议修改如下：
#define _CRT_SECURE_NO_DEPRECATE#include <stdio.h>#include <string.h>/********************************************************************* Function： my_strstr()* Description: 在一个字符串中查找一个子串;* Input：ps: 源;pd：子串* Return : 0：源字符串中没有子串; 1：源字符串中有子串;*********************************************************************/char * my_strstr(char * ps, char *pd){char *pt = pd;int c = 0;while (*ps != '\0'){if (*ps == *pd){while (*ps == *pd && *pd != '\0'){ps++;pd++;c++;}}else{ps++;}if (*pd == '\0'){return (ps - c);}c = 0;pd = pt;}return 0;}/********************************************************************* Function： my_memcpy()* Description: 复制一个内存区域到另一个区域;* Input：src: 源;count: 复制字节数.* Output：dest: 复制目的地;* Return :dest;*********************************************************************/void * my_memcpy(void * dest, const void *src, size_t count){char *tmp = (char *)dest, *s = (char *)src;while (count--)*tmp++ = *s++;return dest;}/********************************************************************* Function： str_replace()* Description: 在一个字符串中查找一个子串，并且把所有符合的子串用另一个替换字符串替换。* Input：p_source:要查找的母字符串； p_seach要查找的子字符串;p_repstr：替换的字符串;* Output：p_result:存放结果;* Return :返回替换成功的子串数量;* Others:p_result要足够大的空间存放结果，所以输入参数都要以\0结束;*********************************************************************/int str_replace(char *p_result, char* p_source, char* p_seach, char *p_repstr){int c = 0;int repstr_leng = 0;int searchstr_leng = 0;char *p1;char *presult = p_result;char *psource = p_source;char *prep = p_repstr;char *pseach = p_seach;int nLen = 0;repstr_leng = strlen(prep);searchstr_leng = strlen(pseach);do {p1 = strstr(psource, p_seach);if (p1 == 0){strcpy(presult, psource);return c;}c++; //匹配子串计数加1;//printf("结果:%s\r\n", p_result);//printf("源字符:%s\r\n", p_source);// 拷贝上一个替换点和下一个替换点中间的字符串nLen = p1 - psource;memcpy(presult, psource, nLen);// 拷贝需要替换的字符串memcpy(presult + nLen, p_repstr, repstr_leng);psource = p1 + searchstr_leng;presult = presult + nLen + repstr_leng;} while (p1);return c;}#define MAX 200int main(void){int i = 0;char s[MAX] = { 0 }; //存放源字串char s1[MAX] = { 0 }; //存放子字串char s2[MAX] = { 0 }; //存放替换字串char result_a[2000] = { 0 };//存放替换结果;puts("Please input the string for s:");gets_s(s,MAX);puts("Please input the string for s1:");gets_s(s1, MAX);puts("Please input the string for s2:");gets_s(s2, MAX);i = str_replace(result_a, s, s1, s2);printf("替换%d个子字符串;\r\n", i);printf("替换后结果:%s\r\n", result_a);}
