Error : C Program for Arithmetic Operations using Functions

Question

I am trying to write a small c-program to perform arithmetic operations using functions, but facing some error.

Can some one please have a look on this code and verify it, please!

Error:

--------------------Configuration: mingw5 - CUI Debug, Builder Type: MinGW--------------------

Checking file dependency...
50: error: cannot convert `div_t' to `int' in assignment
64: error: a function-definition is not allowed here before '{' token
69: error: a function-definition is not allowed here before '{' token
74: error: a function-definition is not allowed here before '{' token
79: error: a function-definition is not allowed here before '{' token
84: error: a function-definition is not allowed here before '{' token
90:2: warning: no newline at end of file

Complete Make Untitled25: 6 error(s), 1 warning(s)

CODE

#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
int add(int, int);
int sub(int, int);
int mul(int, int);
int divs(int, int);
int print(int);

int main(){
int ans,a,b,n;

printf("******************");
printf("\n1 ADD");
printf("\n2 SUB");
printf("\n3 MUL");
printf("\n4 DIV");
printf("\n5 EXT");
printf("\n******************");
printf("\n\n\nEnter Your Option(1-5):");
scanf("%d",&n);

 // n=1;

printf("\nEnter Values a,b:");      
scanf("%d%d",&a,&b);

 // a=1;b=2; 

if(n==4&&b==0){
    printf("\n\n Value of `B` Can't Be `0` for Division\n\n");
    exit(EXIT_SUCCESS);
}


if(n>0&&n<6){



if(n==1){
    ans=add(a,b);
//  main();
}

if(n==2){
    ans=sub(a,b);
//  main();
}
if(n==3){
    ans=mul(a,b);
//  main();
}
if(n==4){
    ans=divs(a,b);
//  main();
}
if(n==5){
          exit(EXIT_SUCCESS);
}



print(ans);

}
else {
    printf("\nWorng Entry!\n ");
    exit(EXIT_SUCCESS);
}



int add(int a,int b){
    ans=a+b;
        return(ans);
}

int sub(int a,int b){
    ans=a-b;
        return(ans);
}

int mul(int a,int b){
    ans=a*b;
        return(ans);
}

int divs(int a,int b){
    ans=a/b;
    return(ans);
}

int print(int ans){
    printf("\n\n Answer = %d",ans);
    return; 
}



}

I am using C-Free Professional to write and compile C Programs. I have tried on-line C-Program Compilers also. But same error.

Please don't continuously update the question as people solve your errors in the answers. Post a new question if you need to. — shuttle87, May 21 '14 at 19:59

shuttle87 · Accepted Answer · 2014-05-21T20:00:50.457

1

You included:

#include<stdlib.h>

This contains a function div() already which has a different return type to your div function hence giving this error. To solve this you will either have to rename you div function or not use this include file.

For more info on the built in div see: http://www.tutorialspoint.com/c_standard_library/c_function_div.htm

Also you will need to take all of your functions and move them to outside main. Right now you have the following:

int main(){
...
int add(int a,int b){
    ans=a+b;
        return(ans);
}
...
}

which needs to be changed to

int add(int a,int b){
    return( a+b); //note there is no "ans" now
}

int main(){
...
...
}

edited May 21 '14 at 20:00

answered May 21 '14 at 19:53

shuttle87

15,466
11
77
106

Question Updated.. changed `div` to `divs`.. but still new errors :O – user3662340 May 21 '14 at 19:56
when i UPDATED like that it is showing `15: error: 'ans' was not declared in this scope` – user3662340 May 21 '14 at 19:59

score 1 · Answer 2 · answered May 21 '14 at 19:54

1

div() is part of the standard library, and defined in stdlib.h, which you include in your program. You will have to use a different name for your function, for example my_div.

There are some more errors in your code - most important, standard C does not have nested functions.

answered May 21 '14 at 19:54

Chris

4,133
30
38

thank you.. but i changed `div` to `divs`.. and still new errors :( question updated – user3662340 May 21 '14 at 19:57
@user3662340: Note the second paragraph of this answer. – Bill Lynch May 21 '14 at 20:03

score 0 · Answer 3 · edited May 23 '17 at 11:57

0

div already exists as a standard C function, and returns a different type. See here

You'll need to use a different name for your div.

edited May 23 '17 at 11:57

Community

1
1

answered May 21 '14 at 19:52

The Archetypal Paul

41,321
20
104
134

thank you.. but i changed `div` to `divs`.. and still new errors :( question updated – user3662340 May 21 '14 at 19:58
div_t is the type returned by div, so you're using that somewhere. Are you sure you posted the exact code you're compiling? – The Archetypal Paul May 21 '14 at 20:00

Error : C Program for Arithmetic Operations using Functions

3 Answers3