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f1();
f2():
f3();
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if (f1() < 0 ) goto end;
f2():
f3();
end:
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end:
...
}//ËÆºõÔĶÁÆðÀ´Ò²²¢²»Êæ·þ£¬
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f() {
f1();
f2();
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}
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f() {
f1();
f2();
...;
catch:
switch class_e {
case e1:
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}
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