c语言size_t数据类型输出时%zd不起作用

[snleon]

#include<stdio.h>

int main(void)
{
size_t nGrades = 0;
printf("Enter the number of grades:");
scanf("%zd",&nGrades);
int grades[nGrades];
long sum = 0L;
float average = 0.0f;
printf("\nEnter the %zd grades:\n", nGrades);

//read the nunmbers to be averaged
for(size_t i = 0; i < nGrades; i++)
{
printf("%2zd> ",i + 1);
scanf("%d", &grades[i]);
sum += grades[i];
}

printf("The grades you entered are:\n");
for(size_t i = 0; i < nGrades; ++i)
{
printf("Grade[%2zd] = %3d ", i + 1, grades[i]);
if( (i+1) % 5 == 0)
printf("\n");
}

average = (float) sum/nGrades;
printf("\nAverage of the %zd grades entered is:%.2f\n", nGrades, average);
return 0;
}

[renwotao2009]

size_t是无符号整型，用u%

[paschen]

用%u

[龙山升龙霸]

无符号整形 用%u，