C语言帮忙看下哪里错了

#include "stdio.h"
void main ()
{
int i=1, j=2;
float x=1.0, y=2.0;
double pi=3.14, c=300000;
printf("\nThis is my first C program!\n");
printf("%d + %d = %d\n", i, j, i+j);
printf("%c + %c = %c\n", i, j, i+j);//printf('%c + %c = %c\n', i, j, i+j);
printf("%4.1f / %4.1f =%4.2f\n", x, y, x/y);
printf("%1f * %1f = %8.4f\n", pi, c, pi*c);
}

#include "stdio.h"
void main ()
{
int i=1, j=2;
float x=1.0, y=2.0;
double pi=3.14, c=300000;
printf("\nThis is my first C program!\n");
printf("%d,%d,%d\n", i, j, i+j);//中间不能有+号，你要按语法规则来啊
printf("%c,%c,%c\n", i, j, i+j););//中间不能有+号，你要按语法规则来啊
printf("%4.1f, %4.1f =%4.2f\n", x, y, x/y);//语法规则错
printf("%1f, %1f,%8.4f\n", pi, c, pi*c);//语法规则错
楼主要再看看语法规则啊