error C2440

MsmVc

I all I got one example from planetsourcecode.When i compile these code then i am geeting error please help me.

#include "stdafx.h"
#include<stdlib.h>
#include<stdio.h>
#include<conio.h>
#include<string.h>

int _tmain(int argc, _TCHAR* argv[])
{
char *s;
int i,l,*a,f,c,x;
printf("Enter a string : ");
scanf("%s",s);
l=strlen(s);
s[l]=0;
a=(char*)malloc(l);
for(i=0;i=l)

        {
        a\[x\]=c=0;
        if(x<0){f=0;break;}
        a\[x\]++;
    }
}

printf("Completed");

return 0;

}

Error

error C2440: '=' : cannot convert from 'char *' to 'int *'
error C2109: subscript requires array or pointer type
error C2143: syntax error : missing ';' before ')'

Please help me

Adam Roderick J

You can seee the error... Now decide why?

int i,l,*a,f,c,x;
printf("Enter a string : ");
scanf("%s",s);
l=strlen(s);
s[l]=0;
a=(char*)malloc(l);

Величие не Бога может быть недооценена.

MsmVc

yes i know there is error.When i change Int *a to CHAR *a.But still i have two error. Error

error C2109: subscript requires array or pointer type
error C2143: syntax error : missing ';' before ')'

If you know solution or condition then please help me

Adam Roderick J

I cannot get the this code? Surely having problem, but whether it is related to your code or formating error, please check these things, you can solve these issues. These are just syntax errors.

for(i=0;i f=1,c=0;

Величие не Бога может быть недооценена.

MsmVc

Thanks for reply I have change in code then runing well.Please check it.

#include "stdafx.h"
#include<stdlib.h>
#include<stdio.h>
#include<conio.h>
#include<string.h>

int _tmain(int argc, _TCHAR* argv[])
{
char *s,*a;
int i,l,f,c,x;
printf("Enter a string : ");
scanf("%s",s);
l=strlen(s);
s[l]=0;
a=(char*)malloc(l);
for(i=0;i<l;i++);
f=1,c=0;
while(f)

    {
    x=l-1;
    a\[x\]=c++;
    for(i=0;i<l && c-1<l;i++)
    printf("%c",s\[a\[x\]\]);
    if(i>=l) 
    printf("\\n");
    while(a\[x\]>=l)


        {
        a\[x\]=c=0;
        if(x<0){f=0;break;}
        a\[x\]++;
    }
}

printf("Completed");

return 0;

}

Error

Run-Time Check Failure #3 - The variable 's' is being used without being initialized.

Please help me

Adam Roderick J

Here, i think you have to help yourself, by learning the syntax of C. I prefer you to read a C programming book to get throught with syntax.:thumbsup: See in your code, you cannot use scanf as you wish, it is expecting the address of s. so your compiler is complaining

scanf("%s",s);

Expected code is

scanf("%s",&s);

Величие не Бога может быть недооценена.

MsmVc

Thanks for reply Now i am getting exception in line s[l]=0;

Unhandled exception at 0x1026f8bc (msvcr90d.dll) in TestingProject.exe: 0xC0000005: Access violation reading location 0xcc006975.

Game point

try this

char *s = new char;

:~ Failure is Success If we learn from it!!:~

MsmVc

I have change in code char *s = new char(230) Still i have same exception. Please help me

Fareed Rizkalla

You can use casting, I know it's available in C++. Don't know about C, does it have to be C or C++?

MsmVc

thank for make comment but sorry can you describe in detail.What's not available? please describe in detail.

Fareed Rizkalla

i'm not sure if you've attempted to add float to an int data type, but you get compiler errors in the end. you want to add float and int to each other. Casting: int x = 12; float y = 4.0; int sum = x + (int)y;

MsmVc

Thank for reply but it's not useful for me because where i use int + float.If you have solution then please help me.

Emilio Garavaglia

no, no, no .... That's not the way to go! You put some code with some syntax error and even some misconception in it. That reveal that you are not understanding what your code has to do. The compiler just gives some errors, but those errors are random as your code is. Attempting to fix those errors doesn't lead anywhere: you're never granted your code will do what you expect. For example:

char \*s;
int i,l,\*a,f,c,x;
printf("Enter a string : ");
scanf("%s",s);

s is a pointer pointing to nowhere: where do ypu thoing your scanf can write to ?!? s[l]=0; tries to write to nowhere since s is nowhere a is a pointer to int, but you do a=(char*)malloc(l): what did you want to do? allocating char-s or int-s ?!

for(i=0;i
f=1,c=0;
while(f)

This is a mess of tokens with no syntax meaning! Raed about the for syntax, and understand the proper use of '()', ',', and ';'. x=l-1 Wow... you're looking for problems: never use names like "O" and "l": I have to change font before find it's "l-1" and not "l-l" ... Do you get what I mean? If not, than that demonstrate the problem :-) Then: I see a malloc, but i don't see a free: not a good way to program... I don't continue, but what can you do if you don't have clear in your mind what you're gonna do?

2 bugs found. > recompile ... 65534 bugs found. :doh:

MsmVc

Thanks for vital information and suggestion. I want to generate Combination of given String.Like this CString test="ABC", then generate like this AB AC AA BB BC BA CC CA CB If you have any type solution or suggestion then please help me.

Emilio Garavaglia

Ok, that's the problem. Now try to come to an algorithmic solution. That doesn't need to be C or C++, just pseudocode. Only when you find your algorithm looks meaningful, try to code it! Than: the problem is not well formed. Do you want only two char-s combination? Does the input string needs to be 3 char-s wide or can it be whatever? Be sure about that: you risk to produce a code that works on a very specific case, while looking for something more generic.

2 bugs found. > recompile ... 65534 bugs found. :doh:

MsmVc

yes you right.You have any idea about such type of algo because i havn't found algo.Please help me

Emilio Garavaglia

no, I cannot do your homework.

2 bugs found. > recompile ... 65534 bugs found. :doh:

MsmVc

you don't do my home work just i want to know url link or forum name.i know why you do my home work. thank