for ( i = 0; i < lim -1 &&(c = getchar()) != '\n' && c != EOF; ++i )
s[i] = c;
代碼改爲
for ( i = 0; i < lim -1 ; ++i ) {
if(c = getchar()) == '\n' ) break;
if(c == EOF) break;
s[i] = c;
}
for ( i = 0; i < lim -1 &&(c = getchar()) != '\n' && c != EOF; ++i )
s[i] = c;
for ( i = 0; i < lim -1 ; ++i ) {
if(c = getchar()) == '\n' ) break;
if(c == EOF) break;
s[i] = c;
}
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