c语言将字符串s中的子字符串s1全部替换为子字符串s2 C语言将字符串S中子字符串S1全部替换成S2
c\u8bed\u8a00 \u5c06\u5b57\u7b26\u4e32s\u4e2d\u7684\u5b50\u5b57\u7b26\u4e32s1\u5168\u90e8\u66ff\u6362\u4e3a\u5b50\u5b57\u7b26\u4e32s2\uff1f//#include "stdafx.h"//If the vc++6.0, with this line.#include "stdio.h"#include "string.h"int main(void){ char s[300],s1[50],s2[60],tmp[300]; int ls1,ls2,i,j; printf("Input string s,s1,s2...\n"); scanf("%s%s%s",s,s1,s2); ls1=strlen(s1); ls2=strlen(s2); for(j=i=0;s[i];i++){ if(strncmp(s+i,s1,ls1)==0){ strcpy(tmp+j,s2); j+=ls2; i+=ls1-1; } else tmp[j++]=s[i]; } tmp[j]='\0'; strcpy(s,tmp); printf("%s\n",s); return 0;}
s1[t++]=s2[t++] \uff01 \u90fdt++\u4e86\u8fd8t++\uff1b\u52a0\u4fe9\u6b21e\u5c31\u6ca1\u6709\u55bd\uff01
//将字符串s中的子字符串s1全部替换为子字符串s2#define N 50
#define N1 10
#define N2 10
#include <stdio.h>
#include <string.h>
//if s1 is a sub-string of s,return 1
//or, return 0;
int isSub(char *s,char*s1)
{
char *p,*q;
for(p=s,q=s1;*q;p++,q++)
{
if(*p==0) return 0;
else if(*p!=*q) return 0;
}
return 1;
}
//replace s1 in s with s2
void replace(char *s,char *s1,char *s2)
{
int cnt=0,k,j;
char temp[N],*p;
for(p=s; *p; p++)
{
if(*p!=*s1)
temp[cnt++]=*p;
else if(!isSub(p,s1)) //test whether s1 is a sub-string of char *p
temp[cnt++]=*p; // if s1 is not a sub-string of char *p
else // if s1 do is a sub-string of char *p
{
k=strlen(s2);
for(j=0;j<k;j++) //replace s1 with s2
temp[cnt++]=s2[j];
p+=strlen(s1)-1;
}
}
temp[cnt]='\0'; //give the value '\0' to the end of temp
strcpy(s,temp); //s=temp
}
int main()
{
char s[N],s1[N1],s2[N2];
gets(s);
gets(s1);
gets(s2);
replace(s,s1,s2);
puts(s);
return 0;
}
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