#include <stdio.h> //#define 1 true //#define 0 false int lower_case (char ch); int upper_case (char ch ); int to_upper_case (char ); int to_lower_case (char ); int lower_case (char ch) { if(ch>='a' && ch<='z') return 1 ; else return 0 ; } int upper_case (char ch ) // with one parameter (argument) { if(ch >='A' && ch<='Z') return 1 ; else return 0 ; } int to_lower_case (char ch) { if(upper_case(ch)) return ch + 32; // ASCII Code table else return ch; } int to_upper_case (char ch ) { // form small to big if(lower_case(ch)) return ch - 32; // ASCII Code table else return ch; } int main () { int g,f; int b,i; printf("enter a big litter to change it /n"); scanf("%d to change it to lower case %c " ,&g,to_lower_case(f)); printf("enter e small litter to change it to upper case "); scanf("%d to change it to upper case %c",&b, to_upper_case(i)); return 0; }

why don't you use bool for lower_case when you return only 1 or 0 ? also if you write if (condition is true) { return true} else {return false} It is the same as return condition

your whole scanf logic is wrong: - i don't think you want to have all that text in the scanf - you want to save it to variable, not to a function

what do I have to change right now ?

well the "most" bad thing is the scanf

well the "most" bad thing is the scanf

any answer please ?

#include <stdio.h> //#define 1 true //#define 0 false int lower_case (char ch); int upper_case (char ch ); int to_upper_case (char ); int to_lower_case (char ); int lower_case (char ch) { if(ch>='a' && ch<='z') return 1 ; else return 0 ; } int upper_case (char ch ) // with one parameter (argument) { if(ch >='A' && ch<='Z') return 1 ; else return 0 ; } int to_lower_case (char ch) { if(upper_case(ch)) return ch + 32; // ASCII Code table else return ch; } int to_upper_case (char ch ) { // form small to big if(lower_case(ch)) return ch - 32; // ASCII Code table else return ch; } int main () { int g,f; int b,i; printf("enter a big litter to change it /n"); scanf("%d to change it to lower case %c " ,&g,to_lower_case(f)); printf("enter e small litter to change it to upper case "); scanf("%d to change it to upper case %c",&b, to_upper_case(i)); return 0; }

ctype.h exist

#include <stdio.h> //#define 1 true //#define 0 false int lower_case (char ch); int upper_case (char ch ); int to_upper_case (char ); int to_lower_case (char ); int lower_case (char ch) { if(ch>='a' && ch<='z') return 1 ; else return 0 ; } int upper_case (char ch ) // with one parameter (argument) { if(ch >='A' && ch<='Z') return 1 ; else return 0 ; } int to_lower_case (char ch) { if(upper_case(ch)) return ch + 32; // ASCII Code table else return ch; } int to_upper_case (char ch ) { // form small to big if(lower_case(ch)) return ch - 32; // ASCII Code table else return ch; } int main () { int g,f; int b,i; printf("enter a big litter to change it /n"); scanf("%d to change it to lower case %c " ,&g,to_lower_case(f)); printf("enter e small litter to change it to upper case "); scanf("%d to change it to upper case %c",&b, to_upper_case(i)); return 0; }

But i think your logic is wrong after reviewing the code

so what is the correct answer

Have you learned pointer ?

Some variables are undefined, and did compiler gives any warn ?

https://en.cppreference.com/w/c/io/fscanf jsut read the format of the scanf

I only use scanf

I only use scanf

scanf is fscanf to stdin

I didn't understand so far now

int max_of_four(int a, int b, int c, int d) { if (a > b) { if (a > c) { if (a > d) { return a; } else { return d; } } else { if (c > d) { return c; } else { return d; } } } else { if (b > c) { if (b > d) { return b; } else { return d; } } else { if (c > d) { return c; } else { return d; } } } } This is what I used for one of the problems in HackerRank website for finding the max of four numbers given.. The logic is simple, but I'm feeling there's a more elegant way to solve this .. Anyone know of any ? #cpp

make a new variable int max, and set it to a. then check every other value with it, and if it's bigger, reassing it to max

make a new variable int max, and set it to a. then check every other value with it, and if it's bigger, reassing it to max

int max_of_four(int a, int b, int c, int d) { int max; max = a > b ? a : b; max = c > max ? c : max; max = d > max ? d : max; return max; } Is this ok ?

int max_of_four(int a, int b, int c, int d) { int max; max = a > b ? a : b; max = c > max ? c : max; max = d > max ? d : max; return max; } Is this ok ?

I just noticed that I could have done int max(int a, int b) { return (a > b) ? a : b; } and called max() like max(a, max(b, max(c, d)));

int max_of_four(int a, int b, int c, int d) { int max; max = a > b ? a : b; max = c > max ? c : max; max = d > max ? d : max; return max; } Is this ok ?

in this case you don't even need new local variable and you can just reuse a for example; but it might get optimized by compiler anyway

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

Do you click build option to build and run it ?

Yup

Problem is coming in launch jscon file

int max_of_four(int a, int b, int c, int d) { if (a > b) { if (a > c) { if (a > d) { return a; } else { return d; } } else { if (c > d) { return c; } else { return d; } } } else { if (b > c) { if (b > d) { return b; } else { return d; } } else { if (c > d) { return c; } else { return d; } } } } This is what I used for one of the problems in HackerRank website for finding the max of four numbers given.. The logic is simple, but I'm feeling there's a more elegant way to solve this .. Anyone know of any ? #cpp

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

You can store the numbers in an array and then use a loop to find the max

I just noticed that I could have done int max(int a, int b) { return (a > b) ? a : b; } and called max() like max(a, max(b, max(c, d)));

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

Hey I am new in c++ as I am trying to run my code after installing all compiler and other thing in vs code it shows that your program path doesn't exist in launch.json If any can help me plzz reach me out

hmm, interesting, is pointer[0] equal to *pointer?

scanf("%d to change it to lower case %c " ,&g,to_lower_case(f)); Explain this format string what it is supposed to match

what is the wrong in it its just I have passed the function in scanf

How to read XML file in c programming language

Hi, i am using libxml2 opensource library for this. It has all required features. I used it on both linux and windows. https://gitlab.gnome.org/GNOME/libxml2/-/wikis/home

Hi, i am using libxml2 opensource library for this. It has all required features. I used it on both linux and windows. https://gitlab.gnome.org/GNOME/libxml2/-/wikis/home

Can you share code to read XML file using c

Hi, I have this piece of code and when I compile I get the warning: warning: ‘struct ParticleSpecies’ has virtual functions and accessible non-virtual destructor [-Wnon-virtual-dtor] Why is that a warning? What would be the best practice in this case?

Hi, I have this piece of code and when I compile I get the warning: warning: ‘struct ParticleSpecies’ has virtual functions and accessible non-virtual destructor [-Wnon-virtual-dtor] Why is that a warning? What would be the best practice in this case?

Have you defined virtual destructor..??