C language NOTE Process Control

1. Enter the sum of the numbers around an array

Int I, j, a [m] [N], sum = 0;

For (I = 0; I <m; I ++)

{

For (j = 0; j <n; j ++)

{

Scanf ("% d", & A [I] [J]);

If (I = 0 | I = M-1 | j = 0 | j = N-1)

Sum + = A [I] [J];

}

}

For (I = 0; I <m; I ++)

{

For (j = 0; j <n; j ++)

{

Printf ("% d \ t", a [I] [J]);

}

}

Printf ("% d", sum );

2. The input 1 + 1 in the CIN statement cannot be recognized by the computer.

Cin> 1 + 1;

However, the input can be recognized: cout <1 + 1;

3. Int mice = 0;

Mice = 1.6 + 1.7; // The result is 3.

Mice = (INT) 1.6 + (INT) 1.7; // The result is 2.

4. The input character is not carriage return.

While (getchar ()! = '\ N '){};

5. Int B = 7;

Float a = 2.5, c = 4.7;

A = a + (INT) (B/3 * (INT) (A + C)/2) % 4;

Printf ("% F \ n", );

The result is 5.5 (calculated carefully)

6. Determine whether it is an endless loop based on CPU efficiency. Open the Task Manager: performance. If the CPU of a dual-core instance is 50%, it is an endless loop.

7. Use of nsum ++ = I ++;

8. For: expression 1 and expression 3 are mostly comma-separated expressions. Expression 2 is rarely used with a comma ..

All three expressions are optional.

9. If while for cannot contain semicolons unless the loop body is empty.