华为校招2016.09机试 第2题: 字符串查找

#include <cstdio>
#include <cstring>
using namespace std;
#define N 1000
int mystrncmp(char* s, char* t,int n){
    for (int k = 0; k < n; k++){
        if (s[k] == t[k] || t[k] == '?');
        else return 0;
    }
    return 1;
}
int main(){
    char str[N],s[N],t[N];
    scanf("%s",s);
    char* pch = strtok(s, ",");  // strtok: 将字符串分解为一组字符串。s为要分解的字符串，delim为分隔符字符，s指向要分解的字符串，
    // 之后再次调用要把s设成NULL。
    strcpy(s, pch);
    pch=strtok(NULL, ",");
    strcpy(t, pch);

    int m = strlen(s);
    int n = strlen(t);
    char* p = s;
    for (int k = 0; k <= m - n; k++){
        if (mystrncmp(p, t, n)){
            p[n] = '\0';
            puts(p);
            break;
        }
        else{
            p++;
        }
    }
    return 0;
}

#include<cstring>
#include<cstdio>
int main(void)
{
    char input[]="abc,def,ghi";
    char* p;  /* strtok places a NULL terminator infront of the token,if found */
    p = strtok(input,",");
    if(p) printf("%s\n---\n",p); /* Asecond call to strtok using a NULL as the first parameter returns a pointe  to the character following the token */
    p = strtok(NULL,",");
    if(p) printf("%s\n",p);
    return 0;
}