C++ size_t: Usage Guide

In C++, size_t is an unsigned integer type used to represent the size of objects or indices of arrays. It is commonly used in conjunction with the sizeof operator to obtain the byte size of an object or type.

Examples of how to use size_t:

  1. Get the byte size of the object.
size_t size = sizeof(int);
  1. Traverse the array.
size_t length = sizeof(array) / sizeof(array[0]);
for (size_t i = 0; i < length; i++) {
    // 遍历数组元素
}
  1. As the return type of the function:
size_t getLength(const char* str) {
    // 返回字符串的长度
}

In conclusion, size_t is an unsigned integer type used to represent object size or array index, commonly used in operations involving the sizeof operator and arrays.

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