Find Errors in Following C++ Programs - Questions for Paper

By: Prof. Fazal Rehman Shamil						

Last modified on April 16th, 2021			

Find the Errors in Following C++ Programs – Questions for Paper

If you are trying to prepare for your paper of programming, then congratulate, you at the right place to see some important examples of finding the errors in C++ programs.
In this tutorial, we will see the examples of some programs with errors and then we will find the correct code.

Example 1 to find the errors in C++ Code

Wrong Code

int sum,sub,mult,div,module;
int a,b;
cout<<"Enter value of a ="
cin<<a;
cout<<"Enter value of b =;
cin<<b;
sum=a+b;
sub=a-bmult=a*b;
div=a/'b';
module=a%b;

int sum,sub,mult,div,module;

int a,b;

cout<<"Enter value of a ="

cin<<a;

cout<<"Enter value of b =;

cin<<b;

sum=a+b;

sub=a-bmult=a*b;

div=a/'b';

module=a%b;

Correct Code

int sum,sub,mult,div,module;
int a,b;
cout<<"Enter value of a =";
cin>>a;
cout<<"Enter value of b =";
cin>>b;
sum=a+b;
sub=a-b;
mult=a*b;
div=a/b;
module=a%b;

int sum,sub,mult,div,module;

int a,b;

cout<<"Enter value of a =";

cin>>a;

cout<<"Enter value of b =";

cin>>b;

sum=a+b;

sub=a-b;

mult=a*b;

div=a/b;

module=a%b;

Example 2 to find the errors in C++ Code

Wrong Code

int outer; innermost; s;
for(outer=5; outer>=1; outer--)
{
for(s=1 s<=5-outer s++)	
cout<<" ";
for (innermost=1 innermost<=outer innermost++)
{
cout>>"*";
}
cout<<endl;
}
}

int outer; innermost; s;

for(outer=5; outer>=1; outer--)

{

for(s=1 s<=5-outer s++)

cout<<" ";

for (innermost=1 innermost<=outer innermost++)

{

cout>>"*";

}

cout<<endl;

}

Correct Code

int outer, innermost, s;
for(outer=5; outer>=1; outer--)
{
for(s=1; s<=5-outer; s++)	
cout<<" ";
for (innermost=1; innermost<=outer; innermost++)
{
cout<<"*";
}
cout<<endl;
}

int outer, innermost, s;

for(outer=5; outer>=1; outer--)

{

for(s=1; s<=5-outer; s++)

cout<<" ";

for (innermost=1; innermost<=outer; innermost++)

{

cout<<"*";

}

cout<<endl;

}

Example 3 to find the errors in C++ Code

Wrong Code

if(Ascii_value_Variable>=97 & Ascii_value_Variable<=122)
{
cout<<"\nYou have entered a small letter";
}
elseif(Ascii_value_Variable>=65 && Ascii_value_Variable<=90)
{
{
cout<<"\nYou have entered a capital letter";
}
elseif (Ascii_value_Variable>=0 && Ascii_value_Variable>=47;
|| Ascii_value_Variable>=54 & Ascii_value_Variable<=64;
|| Ascii_value_Variable>=91 & Ascii_value_Variable<=96 ;
|| Ascii_value_Variable>=123 & Ascii_value_Variable<=127)
{
cout<<"\nYou have entered a special v_charac_varible";
}
}
elseif (Ascii_value_Variable>=47 & Ascii_value_Variable<=57)
cout<<"\nYou have entered a digit ";
}
}

if(Ascii_value_Variable>=97 & Ascii_value_Variable<=122)

{

cout<<"\nYou have entered a small letter";

}

elseif(Ascii_value_Variable>=65 && Ascii_value_Variable<=90)

{

cout<<"\nYou have entered a capital letter";

}

elseif (Ascii_value_Variable>=0 && Ascii_value_Variable>=47;

|| Ascii_value_Variable>=54 & Ascii_value_Variable<=64;

|| Ascii_value_Variable>=91 & Ascii_value_Variable<=96 ;

|| Ascii_value_Variable>=123 & Ascii_value_Variable<=127)

{

cout<<"\nYou have entered a special v_charac_varible";

}

elseif (Ascii_value_Variable>=47 & Ascii_value_Variable<=57)

cout<<"\nYou have entered a digit ";

}

Correct Code

if(Ascii_value_Variable>=97 && Ascii_value_Variable<=122)
{
cout<<"\nYou have entered a small letter";
}
else if(Ascii_value_Variable>=65 && Ascii_value_Variable<=90)
{
cout<<"\nYou have entered a capital letter";
}
else if (Ascii_value_Variable>=0 && Ascii_value_Variable>=47
|| Ascii_value_Variable>=54 && Ascii_value_Variable<=64
|| Ascii_value_Variable>=91 && Ascii_value_Variable<=96 
|| Ascii_value_Variable>=123 && Ascii_value_Variable<=127)
{
cout<<"\nYou have entered a special v_charac_varible";
}
else if (Ascii_value_Variable>=47 && Ascii_value_Variable<=57)
{
cout<<"\nYou have entered a digit ";
}

if(Ascii_value_Variable>=97 && Ascii_value_Variable<=122)

{

cout<<"\nYou have entered a small letter";

}

else if(Ascii_value_Variable>=65 && Ascii_value_Variable<=90)

{

cout<<"\nYou have entered a capital letter";

}

else if (Ascii_value_Variable>=0 && Ascii_value_Variable>=47

|| Ascii_value_Variable>=54 && Ascii_value_Variable<=64

|| Ascii_value_Variable>=91 && Ascii_value_Variable<=96

|| Ascii_value_Variable>=123 && Ascii_value_Variable<=127)

{

cout<<"\nYou have entered a special v_charac_varible";

}

else if (Ascii_value_Variable>=47 && Ascii_value_Variable<=57)

{

cout<<"\nYou have entered a digit ";

}

Example 4 to find the errors in C++ Code

Wrong Code

cout>>"please enter a sentences of your on choose: ";
cout>>"\n";
gets(Words);
for(number=0;Words[number]!='\0';++number)
{
if(Words[number]=='a' OR Words[number]=='e' OR Words[number]=='i' OR Words[number]=='o' 
OR Words[number]=='u' OR Words[number]=='A' OR Words[number]=='E' OR Words[number]=='I' 
OR Words[number]=='O' OR Words[number]=='U')
++vowel_words;
else if((Words[number]>='a'&& Words[number]<='z') O| (Words[number]>='A'&& Words[number]
<='Z'))
++Consonants;
else if(Words[number]>='0' & Words[number]<='9')
++digit_words;
else if (Words[number]==' ')
++spaces;
}

cout>>"please enter a sentences of your on choose: ";

cout>>"\n";

gets(Words);

for(number=0;Words[number]!='\0';++number)

{

if(Words[number]=='a' OR Words[number]=='e' OR Words[number]=='i' OR Words[number]=='o'

OR Words[number]=='u' OR Words[number]=='A' OR Words[number]=='E' OR Words[number]=='I'

OR Words[number]=='O' OR Words[number]=='U')

++vowel_words;

else if((Words[number]>='a'&& Words[number]<='z') O| (Words[number]>='A'&& Words[number]

<='Z'))

++Consonants;

else if(Words[number]>='0' & Words[number]<='9')

++digit_words;

else if (Words[number]==' ')

++spaces;

}

Correct Code

cout<<"please enter a sentences of your on choose: ";
cout<<"\n";
gets(Words);
for(number=0;Words[number]!='\0';++number)
{
if(Words[number]=='a' || Words[number]=='e' || Words[number]=='i' || Words[number]=='o' || Words[number]=='u' || Words[number]=='A' || Words[number]=='E' || Words[number]=='I' || Words[number]=='O' || Words[number]=='U')
++vowel_words;
else if((Words[number]>='a'&& Words[number]<='z') || (Words[number]>='A'&& Words[number]<='Z'))
++Consonants;
else if(Words[number]>='0'&& Words[number]<='9')
++digit_words;
else if (Words[number]==' ')
++spaces;
}

cout<<"please enter a sentences of your on choose: ";

cout<<"\n";

gets(Words);

for(number=0;Words[number]!='\0';++number)

{

if(Words[number]=='a' || Words[number]=='e' || Words[number]=='i' || Words[number]=='o' || Words[number]=='u' || Words[number]=='A' || Words[number]=='E' || Words[number]=='I' || Words[number]=='O' || Words[number]=='U')

++vowel_words;

else if((Words[number]>='a'&& Words[number]<='z') || (Words[number]>='A'&& Words[number]<='Z'))

++Consonants;

else if(Words[number]>='0'&& Words[number]<='9')

++digit_words;

else if (Words[number]==' ')

++spaces;

}

Example 5 to find the errors in C++ Code

Wrong Code

for(x=0;x<z;x++)
{
for(y=0;y<=x;y++)
{
if(a=='Z')
break;
cout<<a;
a++;
}
cout<<endl;
}

for(x=0;x<z;x++)

{

for(y=0;y<=x;y++)

{

if(a=='Z')

break;

cout<<a;

a++;

}

cout<<endl;

}

Correct Code

This code is error free code.

1	This code is error free code.

Author
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Prof. Fazal Rehman Shamil

CEO @ T4Tutorials.com
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Find Errors in Following C++ Programs – Questions for Paper

Find the Errors in Following C++ Programs – Questions for Paper

Example 1 to find the errors in C++ Code

Example 2 to find the errors in C++ Code

Example 3 to find the errors in C++ Code

Example 4 to find the errors in C++ Code

Example 5 to find the errors in C++ Code

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