08/04/25 05:41:34
>>451
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int myStrstr(char *strA, char *strB){
int i, j, pos;
pos = -1;
for(i=0; strA[i] != '\0'; ++i){
if(strA[i] == strB[0]){
for(j=1; strB[j] != '\0' && strA[i+j] == strB[j]; ++j);
if(strB[j] == '\0'){
pos = i;
break;
}
}
}
return pos;
}
char* strDouble(char *strA){
char *p;
int i;
p = (char*)malloc(sizeof(char) * (strlen(strA) * 2 + 1));
if(p == NULL) return NULL;
for(i=0; strA[i] != '\0'; ++i){
p[i*2] = strA[i];
p[i*2+1] = strA[i];
}
p[i*2] = '\0';
return p;
}