我有下面的代码,其中strcat导致问题。strcat导致字符串变空
char* tokens = strtok(buf, "+");
int n = 0;
int type = 0;
char* name = "";
char* lifetime = "";
char* data = "";
for(n=0; tokens!=NULL; n++) {
if(n==0)
type = atoi(tokens);
if(n==1)
name = tokens;
if(n == 2) {
if(type == 1)
lifetime = tokens;
else
data = tokens;
}
if(n == 3)
lifetime = tokens;
tokens = strtok(NULL, "+");
}
if(type == 2) {
printf("Received Data with Name: %s, Data: \"%s\" and lifetime: %s seconds\n", name, data, lifetime);
strncat(name, "+", 1);
printf("Data: %s\n", data);
strncat(name, data, strlen(data));
printf("Full Name: %s\n", name);
}
在我正确打印的名称,数据和寿命都打印行。但是在strcat操作之后,我发现data
值是空的。在添加调试printf语句之后,我发现data
值在strncat(name,"+",1)
之后变为空。可能是什么原因?请帮忙。