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For finding floor((float)(a+c)/2), for large a,c
 
Let d= floor((float)(a+c)/2);
 
My approach
ll int r=(a+c)%2;
if(r==0||r==1)
{
	d=(a+c)/2;
}
else if(r==-1)//for negative d
{
	d=(a+c)/2-1;
}
 
Alternative
set d=(a+c)/2;
 
if(a+c<0)
	d--;
 
Both methods will calculate floor((float)(a+c)/2);

prog.cpp:1:1: error: ‘For’ does not name a type
 For finding floor((float)(a+c)/2), for large a,c
 ^~~
prog.cpp:5:1: error: ‘My’ does not name a type
 My approach
 ^~
prog.cpp:7:1: error: expected unqualified-id before ‘if’
 if(r==0||r==1)
 ^~
prog.cpp:11:1: error: expected unqualified-id before ‘else’
 else if(r==-1)//for negative d
 ^~~~
prog.cpp:16:1: error: ‘Alternative’ does not name a type
 Alternative
 ^~~~~~~~~~~
prog.cpp:19:1: error: expected unqualified-id before ‘if’
 if(a+c<0)
 ^~
prog.cpp:22:1: error: ‘Both’ does not name a type
 Both methods will calculate floor((float)(a+c)/2);
 ^~~~

Standard output is empty