strcat() for formatted strings

Question

I\'m building a string piece by piece in my program and am currently using a mix of strcat() when I\'m adding a simple string onto the end, but when im adding a formatted string

Answer 1

no it's not possible but you could use sprintf() on those simple strings and avoid calling strlen() every time:

len = 0;
len += sprintf(buf+len, "%s", str);    
len += sprintf(buf+len, " number %d", one);