用c语言实现矩阵的各种运算# include # include # define M 20 # define N 20 float A[M][N]; float B[M][N]; float C[M][N]; int i,j,m,n,p,q; float y=1.0; void add()//矩阵加法 { printf("请输入矩阵A的行数和列数(用逗号隔开):"); scanf("%d,%d",&i,&j); printf("请输入