computer-architecture

maximum memory which malloc can allocate

落爺英雄遲暮 提交于 2019-11-26 03:34:31
问题 I was trying to figure out how much memory I can malloc to maximum extent on my machine (1 Gb RAM 160 Gb HD Windows platform). I read that the maximum memory malloc can allocate is limited to physical memory (on heap). Also when a program exceeds consumption of memory to a certain level, the computer stops working because other applications do not get enough memory that they require. So to confirm, I wrote a small program in C: int main(){ int *p; while(1){ p=(int *)malloc(4); if(!p)break; }

System where 1 byte != 8 bit? [duplicate]

拟墨画扇 提交于 2019-11-26 01:27:51
问题 This question already has an answer here: What platforms have something other than 8-bit char? 12 answers All the time I read sentences like don\'t rely on 1 byte being 8 bit in size use CHAR_BIT instead of 8 as a constant to convert between bits and bytes et cetera. What real life systems are there today, where this holds true? (I\'m not sure if there are differences between C and C++ regarding this, or if it\'s actually language agnostic. Please retag if neccessary.) 回答1: On older machines,