字符串操作练习以及scanf()的注意事项

/*
 ============================================================================
 Name        : String.c
 Author      : lf
 Version     :
 Copyright   : Your copyright notice
 Description : 字符串操作练习以及scanf()的注意事项
 1 字符串的插入
 2 删除字符串中的字符
 3 scanf()的注意事项
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void test1();
void test2();
void test3();

int main(void) {
test1();
test2();
test3();
return EXIT_SUCCESS;
}


/**
 * 字符串的插入
 * 操作步骤:
 * 1 找到插入的位置
 * 2 保存插入位置之后的字符串
 * 3 将插入位置之后的字符串截掉
 * 4 原字符串与待插入字符串组拼
 * 5 原字符串与原插入位置后的字符串组拼
 */
void test1(){
char insertString[10]=" hello vc";
char oldString[40]="hello java hello C++ hello c";
printf("oldString=%s\n",oldString);
char searchString[10]="C++";
char *p=strstr(oldString,searchString);
if (p!=NULL) {
char tempString[20];
strcpy(tempString,p+strlen(searchString));
printf("tempString=%s\n",tempString);
*(p+strlen(searchString))='\0';
printf("oldString=%s\n",oldString);
strcat(oldString,insertString);
printf("oldString=%s\n",oldString);
strcat(oldString,tempString);
printf("oldString=%s\n",oldString);
} else {
printf("NOT FOUND\n");
}
printf("============\n");
}


/**
 * 删除字符串中的字符
 */
void test2() {
int location = 0;
char oldString[40] = "hello java hello C++ hello c";
printf("oldString=%s\n", oldString);
char newString[40];
char deleteChar = 'l';
char *p = oldString;
while (*p != '\0') {
if (*p != deleteChar) {
newString[location] = *p;
location++;
} else {

}
p++;
}
printf("newString=%s\n", newString);
strcpy(oldString,newString);
printf("oldString=%s\n", oldString);
printf("============\n");
}

/**
 *  scanf()的注意事项
 *  scanf()会将空格,制表符,空格,换行符,换页符当做数据的终止符.
 *  但是gets()不会,所以在输入字符串含有以上字符时可gets()
 */
void test3() {
//char a[30];
//scanf("%s", a);
//printf("a=%s\n", a);

char b[30];
gets(b);
printf("b=%s\n", b);
}