New program to read three numbered integer using getchar

This is a discussion on New program to read three numbered integer using getchar within the C Programming forums, part of the General Programming Boards category; 1. I know I'll get told off for not using int void main() and return 0; but when I tried ...

  1. #1
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    Oct 2011
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    New program to read three numbered integer using getchar

    1. I know I'll get told off for not using int void main() and return 0; but when I tried using them the program wouldn't compile at all. Now it runs but puts out a strange number (i.e. when I input 123 it outputs 2293568

    Code:
    #include<stdio.h> void main()
    
    
    {
    
    
    int num[3]; /*Sets array to 10*/
    int count;
    
    
    	printf("Enter a 3 numbered integer:");
    
    
    	for(count=0; count<3; count++){
                getchar();
                
      }
      
     	 printf("%d", num);
    		
    		
    return;
    
    
    }
    Last edited by Interista; 11-03-2011 at 12:24 PM.

  2. #2
    C++ Witch laserlight's Avatar
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    I don't really know what you are trying to do, but here is an example based on your code:
    Code:
    #include<stdio.h>
    
    int main(void)
    {
        int num[3];
        int count;
        printf("Enter a 3 numbered integer:");
        for (count = 0; count < 3; count++)
        {
            num[count] = getchar();
            printf("%d\n", num[count]);
        }
        return 0;
    }
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  3. #3
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    Code:
    #include<stdio.h>
    int main()
    {         int num[3]; /*Sets array to 3*/
            int count;
            char c;
            printf("Enter a 3 numbered integer:");
            for(count=0; count<3; count++){ 
                    c=getchar();
                    printf("%c\n",c);
            } 
            return 0;
    
    }
    ~

  4. #4
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    Quote Originally Posted by looza View Post
    Code:
    #include<stdio.h>
    int main()
    {         int num[3]; /*Sets array to 3*/
            int count;
            char c;
            printf("Enter a 3 numbered integer:");
            for(count=0; count<3; count++){ 
                    c=getchar();
                    printf("%c\n",c);
            } 
            return 0;
    
    }
    ~
    If you are trying to compile a 3 digit number like 192 using getchar()...
    1) use scanf() it's just a whole lot easier.

    2) you need this...
    Code:
    num = 0;
    
    for (i = 0; i < 3; i++)
      { num = num *10;
         num =  num + getchar(); }

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