Recording A Bug In A Simple C Program

description:

#include "stdio.h"
int main(void){
char c;
while((c = getchar())!=EOF && c!='\n'){
char b;
if(c == ' '){
if(b!=' '){
putchar(c);
b=c; //
}else{ //
continue;//
} //
}else{
b=c; //miss this sentence
putchar(c);
}
/*b = c; 所有注//句可删之，此句代之，不浪费一行代码*/
}
return 0;
}