[Solved] Char Questions

[Holloweye]

In C not C++.

 

1. How can I add a int with a char? Like:

 

int x = 5;

char a;

a = x;

 

 

2. How can I add 2 char's to one char? Like:

 

char a[];

a = "HELLO ";

char b[];

b = "WORLD";

a += b;

 

Thanks

[Masterxilo]

1. How can I add a int with a char? Like:

int x = 5;
char a;
a = x;

How is that an addition? Do you mean you want to assign an int to a char? Then your code should work. You can also do an explicit conversion:

int x = 5;
char a;
a = (char)x;

 

For 2.:

char a[80];
strcpy(a, "HELLO ");
strcat (a, "WORLD");

[Holloweye]

But if I try to do this:

 

int x = 5;

char a[9];

strcpy(a,"SCORE ");

strcat(a,(char*)x);

 

I dont get any errors but after a while the program crash. I guess the error is when trying copy the x variable to a. Anyone know what could fix this?

[Niosop]

You want either itoa or sprintf to convert the integer 5 to the string "5". As it is you're telling it to try and make a string out of whatever is at a memory location, which will cause a crash.

 

Probably something like this:

 

int i = 5;
char a[30];
strcpy(a, "SCORE ");
char buffer[30];
itoa (i,buffer,10);
strcat(a, buffer);

[Holloweye]

You want either itoa or sprintf to convert the integer 5 to the string "5". As it is you're telling it to try and make a string out of whatever is at a memory location, which will cause a crash.

 

Probably something like this:

 

int i = 5;
char a[30];
strcpy(a, "SCORE ");
char buffer[30];
itoa (i,buffer,10);
strcat(a, buffer);

 

 

Error:

main.c:81: warning: implicit declaration of function 'itoa'

 

I have #stdlib.h and string.h included. I guess there is no such function in C.

[Canardia]

int i = 5;
char a[30];
strcpy(a, "SCORE ");
char buffer[30];
itoa (i,buffer,10);
strcat(a, buffer);

That can be written much shorter:

int i=5;
char buffer[30];
sprintf(buffer,"SCORE %d",i);

[Holloweye]

That can be written much shorter:

int i=5;
char buffer[30];
sprintf(buffer,"SCORE %d",i);

 

 

It worked! Thank you very much!