Novice C language learning journey

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At first i do not know why the b array output result is different for the two code as follows.
No long after,i found that because the b array is out of bounds.The b array is only include five elements.So only has five print result is valid for the b array.
the first code as follows:
#include"stdio.h"
#include"stdlib.h"
int main(void){

char b[5]={"hello world"};
int i;
i=0;
while(i<=15){
    printf("%c=%d\n",b[i],b[i]);
    i++;
    }
return 0;
system("pause");

}
捕获.PNG
the second code as follows:
#include"stdio.h"
#include"stdlib.h"
int main(void){

char b[5]={"hello world"};
int i=0;
while(i<=15){
    printf("%c=%d\n",b[i],b[i]);
    i++;
    }
return 0;
system("pause");

}
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(Edited)

Simple case... but...

That's balls! =) Or if you are a girl, Great tits! =)

I mean, you need to keep up with these teaching... or learning. Expose C languange like you want in your veins... I had it, for 2 years... by force, and I can tell you, it was worse than philosophy. But worth the investment in learning.

I can tell you. If you like HPC, you have a job in that area with C knowledge. Also, who knows C knows C++ very easily, and other language. That's just because of the things you need to understand when you learn C.

Myself, I am in a deeper layer of the pyramid, but I know more than just C, because I need to troubleshoot more things that just the logic part of computing.

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what is the mean that you said you had it for two years?
Are you a software engineer?What languages have you studied?

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C coding... I am not a software engineer, I am an HPC engineer which sits a bit also on some grey areas of the software engineers and many other parts of High Performance Computing (HPC).

I have learned C, C++, Java and others I don't recall now. But after reading many languages you sort of start understand lots of things. Later in life I have learned a bit for Fortran, HTML, PHP, python, shell scrips, and others.

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