栈的应用：表达式求值的设计

}

if (!PrintError){ answer = FTop(Operands); FPop(Operands); if (FIsEmpty(Operands) != 1){ fprintf(Change,\ /*如果还有操作数*/ PrintError = 0; } else fprintf(Change,\ }

else{ fprintf(Change,\ PrintError = 0; }

FMakeEmpty(Operands); free(Operands);

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