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C: diff between char* a and char s[]

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Join Date: May 2009 Posts: 18 Hello,

int main(void) {
char s[] = “Hello”; // here the data will be stored in stack
char* ss = “Hello”; // Can u tell me where this data will be stored in process
// memory layout
ss[0] = ‘a’; // gives segmentation fault, why
}

Thanks in advance
Madhu madhuti is offline 

Reply With Quote Old50 Minutes Ago  #2 (permalink) gerard4143 Linux Enthusiast  
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Join Date: Dec 2007 Location: Canada, Prince Edward Island Posts: 695 Its stored in read only memory. __________________
Make mine Arch Linux gerard4143 is online now  Reply With Quote Old23 Minutes Ago  #3 (permalink) madhuti Just Joined!  
Join Date: May 2009 Posts: 18 Reg: Then what is the difference between the below two statements

const char* p = (char*) malloc(50);
p[0] = ‘a’; // This will gives a compilation error

const char pp[] = “Hello”;
pp[0] = ‘a’; // This will gives a compilation error

char* s = “Hello”;
s[0] = ‘a’; // this gives a runtime error segmentation fault.

Thanks in advance,
Madhu madhuti is offline  Reply With Quote Old3 Minutes Ago  #4 (permalink) gerard4143 Linux Enthusiast  
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Join Date: Dec 2007 Location: Canada, Prince Edward Island Posts: 695 Number one its three statements not two. If your curious about programming at this level you should get a good tutorial on the debugger and familiarize yourself with bin utilities like objdump. __________________
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This entry was posted on October 12, 2010 by and tagged , .
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