下面是一个使用C语言实现等差数列求和的程序示例: #include <stdio.h> int main() { int firstTerm, commonDifference, n, sum = 0; // 输入等差数列的首项、公差和项数 printf("Enter the first term of the arithmetic sequence: "); scanf("%d", &firstTerm); printf("Enter the common difference ...