1#include <stdio.h>
2#include <string.h>                                         
3
4int main(void)
5{
6    char *loc,str[20];
7    char ch;
8
9    while(1)                                                                   //从第9行构成了一个无限循环，但调试程序的时候，若是正确的输入信息
10    {                                                                         //如第11行输入asd，第18行输入a，正确执行到第24行，返回到第二次循环
11        printf("\nEnter a line of text,enter a blank line to quit.");         //但第二次循环到第12行时，正常随便输入adfafagd按下Enter后，为什么会跳出循环
12        gets(str);                                                            //控制台消失？
13
14        if(strlen(str)==0)
15            break;
16
17        printf("\nEnter a zimu that you want to find in the text.");
18        ch=getchar();   
19        loc=strchr(str,ch);
20
21        if(loc==NULL)
22            printf("\nThe zimu is not in the text.\n\n");
23        else
24            printf("The first location that zimu shows in the text is: %d\n\n",loc-str);
25    }
26    getchar();
27    return 0;
28}

第一次输入的换行没处理

懂了懂了，谢谢简答