C++ 打印基本数据类型在内存中的字节数据

#include<bits/stdc++.h>

typedef unsigned char *byte_pointer;

void show_bytes(byte_pointer start,size_t len){
size_t i;
for(i = 0;i<len;++i){
printf("%.2x “,start[i]);
}
printf(”\n");
}

void show_int(int x){
show_bytes((byte_pointer) &x,sizeof(int));
}

void show_float(float x){
show_bytes((byte_pointer) &x,sizeof(float));
}

void show_pointer(void *x){
show_bytes((byte_pointer) &x,sizeof(void*));
}

int main(){

int val = 10;

int ival = val;
float fval = (float)ival;
int \*pval = &ival;
show\_int(ival);
show\_float(fval);
show\_pointer(pval);

return 0;

}