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adding curly braces

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This commit is contained in:
Jidong Xiao
2023-09-12 13:35:33 -04:00
parent 87b765eb5d
commit 186cbb0453
1 changed files with 5 additions and 3 deletions
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8
lectures/04_pointers/README.md
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@@ -138,8 +138,9 @@ at that location.
const int n = 10;
double a[n];
int i;
for ( i=0; i<n; ++i )
a[i] = sqrt( double(i) );
for ( i=0; i<n; ++i ){
a[i] = sqrt( double(i) );
}
```
<!--both double(i) and (double)i would work, they are the same.-->
- Remember: the size of array a is fixed at compile time. STL vectors act like arrays, but they can grow and
@@ -157,8 +158,9 @@ shrink dynamically in response to the demands of the application.
const int n = 10;
double a[n];
double *p;
for ( p=a; p<a+n; ++p )
for ( p=a; p<a+n; ++p ){
*p = sqrt( p-a );
}
```
- The assignment: *p = a*; takes the address of the start of the array and assigns it to *p*.
- This illustrates the important fact that the name of an array is in fact a pointer to the start of a block of memory. We will come back to this several times! We could also write this line as: *p = &a[0]*; which means “find the location of a[0] and take its address”.