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C++ - VideoTutorials-bg.com

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ool sign(char); - проверява дали символ е знак, споредуказаното правило.// Program Zad111.cpp#include bool formula1();bool digit(char);bool sign(char);int main(){if (formula1()) cout c;if (c != '(') return digit(c);bool yes = formula1();if (!yes) return false;cin >> c;if (!sign(c)) return false;yes = formula1();cin >> c;return yes && c == ')';}Забележка: Ще отбележим още веднаж, че програмата отговаряположително, както за низа 8, така и за низовете 88 и 8a, както заниза (3+9), така и за низа (3+9)а-5.3

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