如何将数组a[4]={0x12,0x34,0x56,0x78}转换为数值b=0x12345678

Question

如何将数组a[4]={0x12,0x34,0x56,0x78}转换为数值b=0x12345678

Answer 1

使用左移运算符就比较简单。

int a[]={0x12,0x34,0x56,0x78};
int sum = 0;
for(int i =0;i<(sizeof(a)/4);i++) {
    sum = (sum << 8) + a[i];
}
printf("%X",sum);