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alex41 [277]
3 years ago
15

On the 74ls74 d flip-flop, the clk input has a small triangle. the pr (preset) and clr (clear) inputs have a circle. what do the

se symbols mean?
Computers and Technology
1 answer:
topjm [15]3 years ago
7 0
The triangle indicates that the clock signal is an edge-triggered signal.
The circle indicates that the signal is low-active (ie., inverted).
The 74LS74 has a positive-edge trigger clock (low to high).
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The answer is "Option D".

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[c++] Write a recursive function takes a word string as input argument and reverse the word. Print out the results of recursive
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Lottery Number Generator Design a program that generates a 7-digit lottery number. The program should have an Integer array with
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Answer:

/******************************************************************************

                             Online C++ Compiler.

              Code, Compile, Run and Debug C++ program online.

Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>

#include <string>

#include <sstream>

using namespace std;

bool equal(int sys[],int user[])

{

    for (int i=0;i<7;i++)

{

 if(sys[i]!=user[i]){

     return false;

 }

}

return true;

}

int main()

{

int sys[7];

int user[7];

int min=0

;int max=9;

string userinput;

while(0==0){

for (int i=0;i<7;i++)

{

    sys[i]=rand() % (max - min + 1) + min;

}

cout <<endl;

   cout<<"enter numbers"<<endl;

for (int i=0;i<7;i++)

{

 getline (cin,userinput);

    if(userinput=="x"){

        return 0;

    }

    else{

 stringstream(userinput) >> user[i];

   

    }

}

     cout<<"User number"<<endl;

for (int i=0;i<7;i++)

{

    cout << user[i];

}

    cout<<"system number"<<endl;

for (int i=0;i<7;i++)

{

    cout << sys[i];

}

if(equal(sys,user))

{

   cout<<"You won !"<<endl;

}else {

       cout<<"Try again :("<<endl;

}

}

   return 0;

}

Explanation:

Using c++ rand function generate a random number between 0-9.

Formula for random number is rand (max-min +1)+min.

Run this in a loop for 7 time and store each number to an array index in sys array which is for system generated number.

now using string take input from user and check if input is x close program else use stringstream to parse input string to int and store it in user array. Stringstream is a cpp header file used for parsing and handling of strin g inputs. Run this program in loop for 7 times.

Now create a function of type boolean denoted by "bool". This will take both arr as parameter and check if both are equal or not. It compares eac index of user array against each index of sys array and if both values are not equal returns false.

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3 years ago
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