/*
Xavier Thomas
Section U01
I affirm that this program is entirely my own work and none of it is the work of any other person.
*/
int main(int argc, char *argv[]){
printf("Welcome To assignment 1\n");
int caseSensitive = 0;
char *outputFile = NULL;
char *inputFile = NULL;
parseCommandLineOptions(argc,argv,&caseSensitive,&outputFile,&inputFile);
// printf("Case '%d' , outputFile '%s' inputfile '%s'\n",caseSensitive,outputFile,inputFile);
int readType = determineRead(inputFile);
// printf("Read Type '%d'\n", readType);
if(readType){
readFile(inputFile,caseSensitive);
}else{
readFromInput(caseSensitive);
}
determineOutput(outputFile);
printPostOrder(&root);
printf("End Of Assingment\n");
return 0;
}
int main(void)
{
/*整型溢出举例*/
unsigned char x = 0xff;
printf("%d\n", ++x);
signed char y =0x7f; //注：0xff就是-1了，因为最高位是1也就是负数了
printf("%d\n", ++y);
signed char m = 0x7f;
signed char n = 0x05;
signed char r = m * n;
printf("%d\n", r);
/*示例一:整型溢出导致死循环*/
short len = 0;
while(len< MAX_LEN) {
len += readFromInput(fd, buf);
buf += len;
}
/*示例二:整型转型时的溢出*/
int copy_something(char *buf, int len)
{
#define MAX_LEN 256
char mybuf[MAX_LEN];
if(len > MAX_LEN){ // <---- [1]
return -1;
}
return memcpy(mybuf, buf, len);
}
