The difference between x++ and x+ in c language

The difference between x and x in C language: x: post-increment operator, first assign the value of x to the expression, and then add 1 to x. x: Addition operator, adds x to the specified value and assigns the result to the expression.

The difference between x and x in C language

x and x are two different things in C language operators, which act differently on the variable x.

x: Post-increment operator

• x increases the value of variable x by 1, but returns the value of x before the increase after this operation.
• In other words, x first assigns the value of x to the expression, and then increments the value of x.

x: The addition operator

• x adds a given value to the value of variable x and returns the result to the expression.
• In other words, the x operator simply calculates the sum of two values.

Example:

<code class="c">int x = 5;
printf("x++ = %d\n", x++); // 输出5
printf("x = %d\n", x);      // 输出6

int y = 5;
printf("x+ = %d\n", x+);   // 输出10
printf("x = %d\n", x);      // 输出5</code>

In the first example, x first assigns the value of x (5) to the expression, and then the value of x Increase by 1. Therefore, printf outputs 5. After that, the value of x becomes 6.

In the second example, x adds the value of x (5) to a given value (5) and assigns the result (10) to the expression. Therefore, printf outputs 10. However, the value of x still remains 5.

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