﻿ C++ exercises and solutions: C++ functions (more)

# C++ exercises and solutions: C++ functions (more)

## C++ functions (more)

### 3. Write a C++ program that will output the multiplication table as show below:

1*1=1          2*1=2                   3*1=3         ……  9*1=1
1+2=2         2*2=4                   3*2=6          ……  9*2=18
…….           …….                   …….           ……  …….
1*9=9         2*8=18                 3*9=27         ……  9*9=81

Solution:

#include <cstdlib>
#include <iostream>
#include<iomanip>
#include<cmath>

using namespace std;

void multable(){
int i,j;
for(i=1;i<10;i++){
for(j=1;j<10;j++)
cout<<j<<"*"<<i<<"="<<j*i<<"\t";
cout<<"\n";}
}
int main(int argc, char *argv[])
{
multable();
system("PAUSE");
return EXIT_SUCCESS;
}

### 4. Write a program that will ask the user to input three integer values from the keyboard. Then it will print the smallest and largest of those numbers.

Solution:

#include <cstdlib>
#include <iostream>
#include<iomanip>
#include<cmath>

using namespace std;

int maxval(int a,int b,int c){
if(a>b){
if(a>c) return(a);
else return(c);}
else if(b>c) return(b);
else return(c);

}
int minval(int a,int b,int c){
if(a<b){
if(a<c) return(a);
else return(c);}
else if(b<c) return(b);
else return(c);

}
int main(int argc, char *argv[])
{
int a,b,c;
cout<<"Enter three integer numbers:";
cin>>a>>b>>c;
cout<<"Max="<<maxval(a,b,c);cout<<"\n";
cout<<"Min="<<minval(a,b,c);
cout<<"\n";
system("PAUSE");
return EXIT_SUCCESS; }

### Comments abcde2017-06-22 tkaisWrite a program that uses while loops to perform the following steps: a. Prompt the user to input two positive integers. Variables: firstNum and secondNum (firstNum must be less than secondNum) (use while loop); create a user-defined function called validateUserInput() to validate the user's input. Use Call-by-Value. validateUserInput() is a value returning function. b. Output all odd numbers between firstNum and secondNum. (use while loop); create a user-defined function called oddNumbers(). Use Call-by-Value. oddNumbers() is a void function. c. Output the sum of all even numbers between firstNum and secondNum. (use while loop); create a user-defined function called sumEvenNumbers(). Use Call-by-Value. Declare a variable called sumEven in the main() for the sumEvenNumbers(). sumEvenNumbers() is a value returning function. Use sumEven to hold a returned value. d. Output the numbers and their squares between 1 and 10. (use while loop): create a user-defined function called displaySquareNumbers(). Call-by-Value. displaySquareNumbers() is a void function. e. Output the sum of the square of the odd numbers between firstNum and secondNum. (use while loop); create a user-defined function called sumSqureOddNumbers(). Use Call-by-Value. Declare a variable called sumSquareOdd in the main(), for the sumSqureOddNumbers(). sumSqureOddNumbers() is a value returning function. Use sumSquareOdd to hold a returned value. f. Output all uppercase letters. (use while loop); create a user-defined function called displayUppercaseLetters(). Use Call-by-Value. displayUppercaseLetters() is a void function. 2017-04-11 imran israr/* Write a program that will ask the user to input three integer values from the keyboard. Then it will print the smallest and largest of those numbers. */ #include using namespace std; void larg_num(int , int , int); int main() { int q,w,r; int input; cout<<"please enter the value of q:"<<"\t"; cin>>q; cout<<"please enter the value of w:"<<"\t"; cin>>w; cout<<"please enter the value of r:"<<"\t"; cin>>r; if(q==w ||q==r ||w==q ||w==r || r==q ||r==w) { cout<<"----------------------------------------------------------------------"<<"\n"; cout<<"please try an other value, because this value are equal :"<<"\t"<<"\n"; cout<<"----------------------------------------------------------------------"<<"\n"; } else { larg_num(q,w,r); } system("pause"); } void larg_num(int q,int w,int r) { if(q>w && q>r) { cout<<"q is greater than other num:"<<"\t"<q && w>r) { cout<<"w is greater than other num:"<<"\t"<q && r>w) { cout<<"r is greater than other num:"<<"\t"< using namespace std; void table_print(int ,int, int, int); int main() { int a,b,c,d; cout<<"please enter the value of a:"<<"\t"; cin>>a; cout<<"please enter the value of b:"<<"\t"; cin>>b; cout<<"please enter the value of c:"<<"\t"; cin>>c; cout<<"please enter the value of d:"<<"\t"; cin>>d; if(a==0 || b==0 || c==0 || d==0) { cout<<"---------------------------------------------------------------"<<"\n"; cout<<"\t"<<"please enter an other value:"<<"\t"<<"\n"; cout<<"---------------------------------------------------------------"<<"\n"; } else { table_print(a,b,c,d); } system("pause"); } void table_print(int a,int b,int c,int d) { for(int i=1;i<=9;i++) { cout< #include using namespace std; int main() { for (int i=1;i<=9;i++) { for(int j=1;j<=9;j++) { cout<

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