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Calculator program in C

Discussion in 'C' started by coderzone, Apr 5, 2006.

  1. matuatua

    matuatua New Member

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    more of this stuffs shabbir but i really do need codes in c programming to try my hands on it please i really need it badly
     
  2. hhyy6623

    hhyy6623 New Member

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    got a little problem here, it doesnt end when i input "n" where it asks me wanna countinues or not
     
  3. matuatua

    matuatua New Member

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    it works perfectly cos i have tried it
     
  4. wdliming

    wdliming New Member

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    but i copy the code into the wxDEV_C++,can not compile successfully
    if(choice=='y'||choice=='Y')
    //main();
    something wrong in "main(); ",could you tell me how to modify it?thank you !!
     
  5. ratnesh

    ratnesh New Member

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    Location:
    lucknow (up)
     
  6. wdliming

    wdliming New Member

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    i forgot~~i wanted to say,i made a project in wxDEV_C++,and copyed the code in it,the wxDEV_C++ told me could not compile successfully;then i thought something was wrong in
    "if(choice=='y'||choice=='a') main();",
    as far as i concerned, the "main()" can not use again in one programme,
     
  7. wdliming

    wdliming New Member

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    At last i find a new solution solve my problem which i proposed yesterday,using the "goto";code is as follows:
    Code:
    #include<stdio.h>
    float add(float,float);
    float sub(float,float);
    float product(float,float);
    float divide(float,float);
    int main(int argc, char *argv[])
    {  
     float n1,n2;    
     char sym,choice;
                
     printf("This Program is a program for calculator\n\n");
        start_again: 
              
     scanf("%f%c%f",&n1,&sym,&n2);    
     if(sym=='+')       
        printf("\n%f",add(n1,n2));  
     if(sym=='-')       
        printf("\n%f",sub(n1,n2)); 
     if(sym=='*')     
        printf("\n%f",product(n1,n2));   
     if(sym=='/')      
         printf("%f",divide(n1,n2));   
     printf("\nDo you wish to continue[y/n]");   
     scanf("%s",&choice);    
     if(choice=='y'||choice=='Y')     
            goto start_again;
            
        system("PAUSE"); 
        return 0;
    }
    float add(float m1,float m2)
    {    return(m1+m2);}
    float sub(float m1,float m2)
    {    return(m1-m2);}
    float product(float m1,float m2)
    {    return(m1*m2);}
    float divide(float m1,float m2)
    {    return(m1/m2);}
     
    Last edited by a moderator: Oct 3, 2010
  8. wdliming

    wdliming New Member

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    i add some functioins and program a new code that based on codezone as follows:
    Code:
    #include<stdio.h>
    float add(float,float);
    float sub(float,float);
    float product(float,float);
    float divide(float,float);
    int main(int argc, char *argv[])
    {  
     float n1,n2;    
     char sym,choice;
                
     printf("This Program is a program for calculator\n");
     printf("Please input two numbers like this:4+5 or 4*5\n");
        start_again: 
              
     scanf("%f%c%f",&n1,&sym,&n2);    
     if(sym=='+')       
        printf("\n%f",add(n1,n2));  
     if(sym=='-')       
        printf("\n%f",sub(n1,n2)); 
     if(sym=='*')     
        printf("\n%f",product(n1,n2));   
     if(sym=='/')      
         printf("%f",divide(n1,n2));   
     printf("\nDo you wish to continue[y/n]\n");
     input:
        scanf("%s",&choice);
     
        if(choice=='n'||choice=='N')
        {    
            printf("Good Luck!!ByeBye!~\n");
            goto end;   
        }
        else if(choice=='y'||choice=='Y')
        { 
            printf("Please Contiue:\n");
            goto start_again;
        }
     else if(choice!='n'||choice!='N'||choice!='y'||choice!='Y')
        {
            printf("Wrong code!\n");
            printf("Input again:\n");
            goto input;
        }    
        end:
        system("PAUSE"); 
        return 0;
    }
    float add(float m1,float m2)
    {    return(m1+m2);}
    float sub(float m1,float m2)
    {    return(m1-m2);}
    float product(float m1,float m2)
    {    return(m1*m2);}
    float divide(float m1,float m2)
    {    return(m1/m2);}
    welcome to give some advice!!
     
    Last edited by a moderator: Oct 3, 2010
  9. Harish723

    Harish723 New Member

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    Ok its alright
     
  10. zaster

    zaster New Member

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    Okay, I understand its meant to be a bare bones sort of program, but still you should include a check for division by 0.
     
  11. Deucel

    Deucel New Member

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    Thanks, and it is good, but...
    To give the program some readability:

    Code:
    #include <stdio.h>
    #include <conio.h>
    main()
    {
      float n1,n2,s,d,p,q;
      printf("\n Enter two numbers:  ");
      scanf("%f %f", &n1, &n2);
      s=n1+n2;
      d=n1-n2;
      p=n1*n2;
      q=n1/n2;
      printf("\n Sum        %9.2f",s);
      printf("\n Difference %9.2f",d);
      printf("\n Product    %9.2f",p);
      printf("\n Quotient   %9.2f",q);
      getch();
      return(0);
    }
     
    Last edited by a moderator: Feb 14, 2011
  12. Naveed Marwat

    Naveed Marwat New Member

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    Nice Sharing
     
  13. alexsmth114

    alexsmth114 New Member

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    Excellent post, couldn't have asked for more!!..
     
  14. sura

    sura Banned

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    very good
    i also like this ..
    its good...
     
  15. rioeduardo

    rioeduardo New Member

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    Thanks for sharing.
     

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