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cleanup: replace C for loops with range

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spaceface777
2020-02-24 17:55:16 +01:00
committed by GitHub
parent 5918946feb
commit ef8c1203b4
50 changed files with 168 additions and 170 deletions
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10
examples/nbody.v
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@@ -33,7 +33,7 @@ pub mut:
}
fn advance(sys mut System, dt f64) {
for i := 0; i < N - 1; i++ {
for i in 0..N - 1 {
mut _vx := sys.v[i].x
mut _vy := sys.v[i].y
mut _vz := sys.v[i].z
@@ -61,7 +61,7 @@ fn advance(sys mut System, dt f64) {
sys.v[i].z = _vz
}
for i := 0; i < N; i++ {
for i in 0..N {
sys.s[i].x += dt * sys.v[i].x
sys.s[i].y += dt * sys.v[i].y
sys.s[i].z += dt * sys.v[i].z
@@ -73,7 +73,7 @@ fn offsetmomentum(sys mut System) {
mut py := f64(0)
mut pz := f64(0)
for i := 0; i < N; i++ {
for i in 0..N {
px += sys.v[i].x * sys.v[i].m
py += sys.v[i].y * sys.v[i].m
pz += sys.v[i].z * sys.v[i].m
@@ -85,7 +85,7 @@ fn offsetmomentum(sys mut System) {
fn energy(sys System) f64 {
mut e := f64(0)
for i := 0; i < N; i++ {
for i in 0..N {
e += 0.5 * sys.v[i].m * (sys.v[i].x * sys.v[i].x + sys.v[i].y * sys.v[i].y + sys.v[i].z * sys.v[i].z)
for j := i + 1; j < N; j++ {
dx := sys.s[i].x - sys.s[j].x
@@ -124,7 +124,7 @@ sys := &System {arr_momentum(), arr_position()}
offsetmomentum(mut sys)
println('${energy(sys):.9f}') //-0.169075164
for i := 0; i < 50000000; i++ {
for i in 0..50000000 {
advance(mut sys, 0.01)
}
println('${energy(sys):.9f}') //-0.169059907