#include void mian() { int a,b; a=5,b=4; if(getchar()=='+') printf("%d+%d=%d",a,b,a+b)
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#include void mian() { int a,b; a=5,b=4; if(getchar()=='+') printf("%d+%d=%d",a,b,a+b)
#include void mian() { int a,b; a=5,b=4; if(getchar()=='+') printf("%d+%d=%d",a,b,a+b)
#include void mian() { int a,b; a=5,b=4; if(getchar()=='+') printf("%d+%d=%d",a,b,a+b)
计算两个数的和
如果键盘输入+即getchar()=='+'获得键盘输入来判断是否计算,输入其他的程序会结束
输入+,会输入两个数的和