<??http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+PHByZSBjbGFzcz0="brush:java;">#include #include #include //system(); 这个指令需要用到此头文件 #include //toupper要用到 void main() { printf("Displaying 0.1234 yields %g\n", 0.1234); printf("Displaying 0.00001234 yields %g\n", 0.00001234); system("pause"); }