题目内容

Only the first and third expressions can be omitted from the three expressions in for loop statement.

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int main(void) {int y=10; while (y--); printf("y=%d\n",y); return 0 ; } The output of the program is ( ).

A. y=0
B. y=-1
C. y=1
D. while forms an infinite loop

%d of the printf function is used to output signed decimal integers.

The %f of the printf function, which is used to output real numbers in exponential form.

The output of the following program is______ 。 int main(void) { char m; m='B'+32; printf("%c\n",m); return 0; }