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C++ Program to convert hexadecimal to decimal with std::hex
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/** * Converting Hexadecimal to Decimal in C++ codebind.com * */ #include <iostream> int main() { int integer; std::cout<<"Entex Hex to Convert hex to decimal"<<std::endl; std::cin >> std::hex >> integer; std::cout << integer << std::endl; return 0; } /* OUTPUT: Entex Hex to Convert hex to decimal 10 16 */ |
C++ Program to convert hexadecimal to decimal without std::hex
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/** * Converting Hexadecimal to Decimal in C++ codebind.com * */ #include<iostream> #include<stdlib.h> #include<conio.h> #include<math.h> unsigned long HexToDec(char hex[]) { char *hexstr; int length = 0; const int base = 16; // Base of Hexadecimal Number unsigned long decnum = 0; int i; // Now Find the length of Hexadecimal Number for (hexstr = hex; *hexstr != '\0'; hexstr++) { length++; } // Now Find Hexadecimal Number hexstr = hex; for (i = 0; *hexstr != '\0' && i < length; i++, hexstr++) { // Compare *hexstr with ASCII values if (*hexstr >= 48 && *hexstr <= 57) { // is *hexstr Between 0-9 decnum += (((int)(*hexstr)) - 48) * pow(base, length - i - 1); } else if ((*hexstr >= 65 && *hexstr <= 70)) { // is *hexstr Between A-F decnum += (((int)(*hexstr)) - 55) * pow(base, length - i - 1); } else if (*hexstr >= 97 && *hexstr <= 102) { // is *hexstr Between a-f decnum += (((int)(*hexstr)) - 87) * pow(base, length - i - 1); } else { std::cout<<"Invalid Hexadecimal Number \n"; } } return decnum; } void main() { unsigned long decnum; char hex[9]; // 8 characters for 32-bit Hexadecimal Number and one for ' ' std::cout<<" Enter 32-bit Hexadecimal Number : "; std::cin>>hex; decnum = HexToDec(hex); std::cout<<"Value in Decimal Number is "<<decnum<<"\n"; getch(); } /* OUTPUT: Enter 32-bit Hexadecimal Number : 10 Value in Decimal Number is 16 */ |
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/** * CONVERTING BINARY TO DECIMAL IN C++ codebind.com * */ #include <iostream> #include <iomanip> #include <string> #include <climits> using namespace std; const size_t maxBits = sizeof(short) * CHAR_BIT; int main(int argc, char *argv[]) { string line; bool inputOk; short n; while (true) { cout << "Enter binary number (" << maxBits; cout << " bits or less) : " << endl; do { cout << "> "; getline(cin,line); inputOk = true; for (size_t i = 0; (i < line.size()) && (inputOk == true); i++) { if ((line[i] != '0') && (line[i] != '1')) { inputOk = false; cout << "non-bit entered" << endl; } } if ((inputOk == true) && (line.size() > maxBits)) { inputOk = false; cout << "too big for " << maxBits << "-bit integer" << endl; } } while (inputOk == false); // Convert string of bits to an integer n = 0; for (int i = line.size()-1, j = 0; i >= 0; --i,j++) { n |= (line[i] - '0') << j; } cout << line << " = " << n << endl; } return 0; } /* OUTPUT: Enter binary number (16 bits or less) : > 101000 101000 = 40 Enter binary number (16 bits or less) : > 10 10 = 2 Enter binary number (16 bits or less) : > 10 10 = 2 Enter binary number (16 bits or less) : > 101 101 = 5 Enter binary number (16 bits or less) : > */ |
Different ways of Putting the above question Binary To Decimal Conversion in C++ Convert Binary to Decimal and from […]
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/** * CONVERT A DECIMAL TO OCTAL IN C++ codebind.com * */ #include <iostream> #include<cmath> using namespace std; void DecToOct(int decnum){ int digits=1; int howbig=1; // check to see how many digits while(1){ if((8*howbig)>decnum){ break; }else{ howbig*=8; digits++; } } // using binary to get octal for(int i=digits;i>0;i--) cout<<((decnum>>((i-1)*3))&7); } void DecToQuat(int decnum){ int digits=1; int howbig=1; // check to see how many digits while(1){ if((4*howbig)>decnum){ break; }else{ howbig*=4; digits++; } } // using binary to get quat for(int i=digits;i>0;i--) cout<<((decnum>>((i-1)*2))&3); } int main(){ int decimalnum; cout<<"Enter the decimal to be converted:"; cin>>decimalnum; DecToOct(decimalnum); cout<<endl; DecToQuat(decimalnum); return 0; } /* OUTPUT Enter the decimal to be converted:16 20 */ |
Different ways of Putting the above question What’s an easy way to convert a Decimal to Octal in C++? […]
Introduction You are apparently somehow stumbled upon the language C ++. I will here shed light on why it is […]
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#include<iostream> using namespace std; int Factorial(int n){ static int i=1;// to make one time initialization cout<<i<<" : time"<<endl; // counting the function calls if(n==1){ return 1;//base case } else{ i++; return n=n*Factorial(n-1); } } int main(){ cout<<"Enter to number to find Factorial: "; int num; cin>>num; num=Factorial(num); // function call cout<<"\nFactorial of number is: "<<num << endl; return 0; } /* OUTPUT Enter to number to find Factorial: 5 1 : time 2 : time 3 : time 4 : time 5 : time Factorial of number is: 120 */ |
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#include<iostream> using namespace std; int main() { int number, reverse = 0; cout<<"Enter a Number to Reverse and press Enter: "; cin>> number; // Taking Input Number in variable number for( ; number!= 0 ; ) { reverse = reverse * 10; reverse = reverse + number%10; number = number/10; } cout<<"Reversed Number is: "<< reverse; return 0; } /* OUTPUT Enter a Number to Reverse and press Enter: 123456789 Reversed Number is: 987654321 */ |
In this post we will see how to add the click event to the QPushbutton with an example. samples.pro
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TARGET = Sample QT = core gui CONFIG += c++11 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets SOURCES += \ main.cpp HEADERS += \ MyMainWindow.h |
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In this post we will see how to write C++ Program list all files in the Directory on Windows and […]
In this post we will see how to write a C++ code to check if the file exists in the […]
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Merge sort Merge sort algorithm is one of two important divide-and-conquer sorting algorithms (the other one is quick sort).Merge MergeIt […]
Selection Sort Algorithm using C++ Selection Sort Repeatedly searches for the largest value in a section of the data Moves […]
Insertion Sort Idea: Start at position 1 and move each element to the left until it is in the correct […]
The bubble sort Algorithm simply compares adjacent elements and exchanges them if they are out of order. To apply the Bubble […]
In this example we will learn how to Display current date and time using C++.
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#include<iostream> #include<cmath> #include <ctime> using namespace std; int main() { time_t t = time(NULL); tm* timePtr = localtime(&t); cout << "seconds= " << (timePtr->tm_sec) << endl; cout << "minutes = " << (timePtr->tm_min) << endl; cout << "hours = " << (timePtr->tm_hour) << endl; cout << "day of month = " << (timePtr->tm_mday) << endl; cout << "month of year = " << (timePtr->tm_mon)+1 << endl; cout << "year = " << (timePtr->tm_year)+1900 << endl; cout << "weekday = " << (timePtr->tm_wday )<< endl; cout << "day of year = " << (timePtr->tm_yday )<< endl; cout << "daylight savings = " <<(timePtr->tm_isdst )<< endl; cout << endl; cout << endl; cout << "Date " <<(timePtr->tm_mday)<<"/"<< (timePtr->tm_mon)+1 <<"/"<< (timePtr->tm_year)+1900<< endl; cout << "Time " << (timePtr->tm_hour)<<":"<< (timePtr->tm_min)<<":"<< (timePtr->tm_sec) << endl; return 0; } /* OUTPUT seconds= 6 minutes = 32 hours = 17 day of month = 4 month of year = 7 year = 2016 weekday = 1 day of year = 185 daylight savings = 1 Date 4/7/2016 Time 17:32:6 */ |
C++ […]
