Test series

Question

What will be the output of following program?

#include <stdio.h>
void f1(char* str, int index)
{
   *(str + index) &= ~32;
}
int main()
{
   char arr[] = "gatecsit";
   f1(arr, 0);
   printf("%s", arr);
   return 0;
}

 

What is the output of the above program?

Comments

~ this indicates NOT ,but why here &= is used?

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@soumayan bandhu The whole expression is like *(str + index) = *(str + index)  & ~32;

Which means you have to perform bitwise AND operation onto the two operand which is present in front of you. So, ASCII of g = 103 you can represent that in bit format and then perform 32 complement bitwise AND operation. So, you will get 71 which is ASCII of "G". 

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Here does ~ this symbol means minus?

But I know ~A means bitwise NOT operation on A.

If A=11001101 ,then ~A=00110010.