C++ Calculator Exits -


i have problem first program in c++.i wrote calculator reason when type operation character quits.it doesn't show error or something,it exits. code visual c++

#include <iostream>  using namespace std;  int  main() {     float n1;     float n2;     float n3;     int op;     cout << "welcome calculator" << endl;     cout << "type first number: ";     cin >> n1;     cout << "type second number: ";     cin >> n2;     cout << "type number operation" << endl;     cout << "1 = addition" << endl;     cout << "2 = subvision" << endl;     cout << "3 = multiply" << endl;     cout << "4 = division" << endl;     cin >> op;     if(op == 1)     {         n3 = n1 + n2;         cout << "the result " << n3 << endl;     }     if(op == 2)     {         n3 = n1 - n2;         cout << "the result " << n3 << endl;     }     if(op == 3)     {         n3 = n1 * n2;         cout << "the result " << n3 << endl;     }     if(op == 4)     {         n3 = n1 / n2;         cout << "the result " << n3 << endl;     }     return 0; }

you might want @ switch statement instead of multiple ifs. default statement can catch happening when none of expected cases match.

switch (op) { case 1: {    // add    break; } // other cases default {    // unexpected, print error } }

Comments

Post a Comment

Popular posts from this blog

matlab - Deleting rows with specific rules -

i got 20*3 cell array , need delete rows contains "137", "2" , "n:t" origin data: 't' '' '' 'np(*)' '' '' [ 137] '' '' [ 2] '' '' 'are' 'and' 'np(fcc_a1#1)' '' '' '1:t' [ 1200] [0.7052] '' [1.2051e+03] [0.7076] '' 'are' 'and' 'np(fcc_a1#3)' '' '' '2:t' [ 1200] [0.0673] '' [1.2051e+03] [0.0671] '' 'are' 'and' 'np(m23c6)' '' '' '3:t' [ 1200] [0.227...
Read more

php - MySQLi multi_query results for later use -

i using mysqli multi_query work several select statemets @ time. know how handle results, able use them later in code. example: <?php //connection stuff $query = "select name, surname database1;"; $query.= "select car, year, type database2 carid='1';"; $query.= "select product, price database3;"; if ($mysqli->multi_query($query)) { if($result = $mysqli->store_result()) { while($row = $result->fetch_row()) { --> here? } } } ?> <html> <div id='persona'> <?php foreach() { --> print name + surname } ?> </div> <div id='cars'> <?php foreach() { --> print car + year + type } ?> </div> <div id='product'> <?php foreach() { --> print product + price } ?> </div> </html> one more thing, prepared statements not possible when using multiple_query, right? there no benefit in putting unrelated queries in 1 multi ...
Read more