题目内容

getchar function has no arguments.

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printf can output multiple data at a time.

%s of scanf function is used to enter a character.

The conditional expression of an if statement must be a relational expression.

There is the following program: #include main() { int a=1,b=0; printf("%d,",b=a+b）; printf("%d\n",a=2*b）; } The output of program running is ( )

A. 0,0
B. 1,0
C. 3,2
D. 1,2