why compilers?

High-level Language

C/Java Compiler

temp = v[k];
v[k] = v[k+1];
v[k+1] = temp;

Fortran Compiler

TEMP = V(K)
V(K) = V(K+1)
V(K+1) = TEMP

Assembly Language

lw $to, 0($2)
lw $t1, 4($2)
sw $t1, 0($2)
sw $to, 4($2)

#include

int main()
{
	char A = '2';
	int sum = A + 10;
	std::cout<<"sum ="<
		Author  blogPosted on 2017年12月24日2017年12月24日Categories Compiler