CPP (C++) vs C, std::string vs char[] : string processing benchmark

Very simple benchmark.
cpp source vs c source

This presents usage of string concatenation operators in c and c++.

C is up to 20 times faster on different compilers on small strings.
(However it just 3 times faster on my CentOS if outer loop increased up to 10000)

[rtg@rtgCent cpp_vs_c]$ g++ -O3 ppstr.cpp -o ppstr
[rtg@rtgCent cpp_vs_c]$ gcc -O3 cstr.c -o cstr
[rtg@rtgCent cpp_vs_c]$ sudo time nice -n -10 ./ppstr
[rtg@rtgCent cpp_vs_c]$ sudo time nice -n -10 ./cstr

(or xlC instead of g++ and gcc if you have IBM compiler)