Thread: Nested if statement not working

  1. #1
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    Exclamation Nested if statement not working

    hello friends
    i am new to this forum

    i am having some problem with nested if statement

    Code:
    #include <stdio.h>#include <stdlib.h>
    
    
    int main()
    {
         int age;
         char gen;
    printf("Enter your age :  \n");
    scanf("%d",&age);
    
    
    printf("Whats your gender m/f :  \n");
    scanf(" %c ",&gen);
    
    
    
    
    if (age >= 18){
    
    
        printf("enter this website");
    
    
        if (gen == 'm'){
        printf("dude");
    
    
        }
    
    
    
    
        }
    
    
    
    
    
    
        return 0;
    }
    when i run this code after enter age ,enter gender nothing shows on screen and program ends there

  2. #2
    TEIAM - problem solved
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    Just before the return 0, do this
    Code:
     putchar();
    It will catch your code before closing

  3. #3
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    hello it shows error

    Nested if statement not working-err1-jpg

  4. #4
    and the hat of int overfl Salem's Avatar
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    He probably meant getchar(), not putchar()

    Also, the trailing space after %c in the second scanf is going to mess you about as well.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  5. #5
    TEIAM - problem solved
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    Sorry, I did mean "getchar"

  6. #6
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    hello still no luck

    Nested if statement not working-noluck-jpg

  7. #7
    TEIAM - problem solved
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    Try putting a newline at the end "dude", or adding...
    Code:
    fflush(stdout);
    after your last printf to flush the output buffer

  8. #8
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    Quote Originally Posted by Click_here View Post
    Try putting a newline at the end "dude", or adding...
    Code:
    fflush(stdout);
    after your last printf to flush the output buffer

    Code:
    #include <stdio.h>#include <stdlib.h>
    
    
    int main()
    {
         int age;
         char gen;
    printf("Enter your age :  \n");
    scanf("%d",&age);
    
    
    printf("Whats your gender m/f :  \n");
    scanf(" %c ",&gen);
    
    
    
    
    if (age >= 18){
    
    
        printf("enter this website");
    
    
        if (gen == 'm'){
        printf("dude");
    
    
        }
    
    
    
    
        }
    
    
     getchar();
     fflush(stdout);
        return 0;
    }

    you meant this?

    this also doesn't print anything after age and gender is entered

  9. #9
    C++ Witch laserlight's Avatar
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    Change this:
    Code:
    scanf(" %c ",&gen);
    to this:
    Code:
    scanf(" %c", &gen);
    Notice I removed the trailing space in the format string.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  10. #10
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    Quote Originally Posted by laserlight View Post
    Change this:
    Code:
    scanf(" %c ",&gen);
    to this:
    Code:
    scanf(" %c", &gen);
    Notice I removed the trailing space in the format string.
    oh it worked! thanks...

    now it works without these lines
    Code:
     getchar();
     fflush(stdout);
    but does c have space issues ?
    Last edited by sash_007; 05-09-2019 at 07:18 PM.

  11. #11
    C++ Witch laserlight's Avatar
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    The trailing space in the format string matches whitespace, so the issue is that you then need to have say, a trailing space in your input for it to be matched, otherwise your program would keep waiting for input to match. This is why it looked like nothing happened: your program was waiting for more input. Note that Salem mentioned this in post #4.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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