题目内容

while and do while statements have the same function.

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Three expressions in the for loop statement, omitting the second expression indicates that the loop condition is true.

When executing the following segments ( ) x=-1； do {x=x*x；} while (!x)；

A. Loop body will execute once
B. The loop body will execute twice
C. The loop body will execute many times
D. You will be prompted for a syntax error

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main() {int s=0,a=1,n; scanf(“%d”,&n); do {s+=1;a=a-2;} while(a!=n); printf("%d\n”,s); }If you want the output value of the program to be 2, the value you should enter for n from the keyboard is ( ).

A. –1
B. –3
C. –5
D. 0

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%f of scanf function, used to enter single precision real number in decimal form.

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