调试内存时，把内存数据拼接成字符串并打印

#include <stdio.h>#include <stdlib.h>#include <string.h>void test_strcat(){    int i=0;    char a[100];    char b[100];    char c[200]="test:";#if 1    for(i=0;i<100;i++){        a[i]=i;        snprintf(b,3, "%x ", a[i]);        strcat(c, b);        printf("the %dth loop, b:= %s ", i, b);        printf("c:= %s \n\n", c);    }#endif    printf("final c:= %s \n", c);}int main(){    test_strcat();    return 0;}~