Bad permissions for mapped region
c, segmentation-fault, string
Solution
You are passing a constant string to your function.
String literals are of type `char [N + 1]` (where `N` is the length of the array) in C, but modifying them results in undefined behavior. Your compiler should have already issued a warning at that point.
If you wish to modify it then you have to create a copy:
char str[] = "BeforeSunrise";
char* rev2=reverseInPlace(str);
Problem
I get an error when trying to run the following function: ``` char* reverseInPlace(char* src) { //no need to alloc or free memory int i=0; int size=mystrlen(src); for(i=0;i<size;i++) { int j=size-i-1; if(i<j) { char temp; printf("Interchange start %d:%c with %d:%c",i,src[i],j,src[j]); temp=src[i]; src[i]=src[j];//error occurs here src[j]=temp; printf("Interchange complete %d:%c and %d:%c",i,src[i],j,src[j]); } } return src; } ``` I call this code like this: ``` char* rev2=reverseInPlace("BeforeSunrise"); printf("The reversed string is %s\n",rev2); ``` The error looks like this: ``` Interchange start 0:B with 12:e Process terminating with default action of signal 11 (SIGSEGV) Bad permissions for mapped region at address 0x401165 ``` Why does this error occur?