用Mars 寫一MIPS 組合語言讀入一正整數n，計算並列印1+2…+n的和。

xinxincaijq

void main(){
int n,i,sum; // assume that $s0 is for n, $t0 for i and $s1 for sum
/* MIPS code for reading an integer. */
addi $v0, $zeros, 5
syscall
add $s0, $zeros, $v0
/*---------------------------------------------*/
// mainly translate the following code into MIPS code
sum=0;
for (i=1; i<=n; i++)
sum+=i;

/* MIPS code for printing an integer */
addi $v0,$zero,1
add $a0,$zeros,$s1
syscall
/*--------------------------------------------*/
addi $v0,$zeros,10
syscall
/*---------------------------------------------*/
}

xinxincaijq

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