字符串倒序输出

读入空格跳出，其余不变；getchar（）单字符读入判断直接TLE；

用到scnaf（ "%[^ ]"， str );表示读入除‘ '以外的所有字符；

#include<iostream>
#include<cstring>
#include<cstdio>

using namespace std;

const int maxn = 1005;
char str[ maxn ], ch[ 5 ], k;
int main(){
while( scanf( "%[^ ]", str ) == 1 ){
;
}
//printf( "1111111111" );k = strlen( str );
k = strlen( str );
for( int i = k - 1; i >= 0; --i )
cout << str[ i ];
cout << endl;

return 0;
}

TLE

#include<iostream>
#include<cstring>
#include<cstdio>

using namespace std;

const int maxn = 1005;
char str[ maxn ], ch, k;
int main(){
k = 0;
while( ( ch = getchar() )!= ' ' ){
str[ k++ ] = ch;
}
for( int i = k - 1; i >= 0; --i )
cout << str[ i ];
cout << endl;
return 0;
}